They Added NEW BIOMES to Subnautica… (Mod)

In this video, we’re going to be exploring a DLC-sized Subnautica mod that literally adds two new biomes to Subnautica along with adding new elements to the game’s story, introducing new flora, fauna, and leviathans, and adding new equipment and base pieces each of which can be constructed with the many new resources now found throughout the Crater. The amount of new content this mod adds to the game is honestly jaw dropping so without any further ado, let’s dive right in...
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More content:
►Best of SpeedyMouse: • Best of SpeedyMouse
►Subnautica Mods: • Subnautica Mods
►Gargantuan Leviathan Mod: • Gargantuan Leviathan M...
All the mods in this video were created by Reika and are available to download below. Scroll to the bottom of each page, find the downloads section, and click the "Via GitHub Releases" button in order to do so. You'll want to install all the mods at once in order for everything to work properly. More information about each of the mods can be found by clicking the download links below as well.
Mods used in this video:
►Dragon Industries - Alterra Division: reikakalseki.github.io/subnau...
►Aqueous Engineering: reikakalseki.github.io/subnau...
►Auroresource: reikakalseki.github.io/subnau...
►Ecocean: reikakalseki.github.io/subnau...
►Exscansion: reikakalseki.github.io/subnau...
►Re(ef)Balance: reikakalseki.github.io/subnau...
►Sea To Sea: reikakalseki.github.io/subnau...
These mods are for legacy Subnautica only so you can only play them on Steam if you rollback to before the 2.0 update. In order to rollback, simply head over to Steam Library and right-click on Subnautica. Select Properties, then Betas, and click on the arrow to select legacy - Public legacy builds.
If you have any questions about how to install these mods, please head over to the Subnautica modding discord for support: / discord
Music by:
Simon Chylinski
If you enjoyed this video, please consider subscribing. It's free and it helps me out a ton!
#subnautica #mod

[@SpeedyMouse]

Hope you guys enjoyed this video! I have a few quick notes I'd like to add: I talked to the creator of these mods, Reika, after uploading this video. It turns out I was mistaken and there have not been any plans to actually model and put the "Abyssal Terror" leviathan (the one in the Void that grabs the player with its tentacle) in the game so that it actually attacks the player after grabbing them and dragging them down deeper into the Void. However, I may or may not have convinced them to do so, which would be absolutely amazing to see. Additionally, the wreck I showed at 18:51 was actually not added by this mod and exists in vanilla Subnautica. I mistook a simple ease of access command for a command leading to a new wreck lol. Not that game changing, but thought I should let y'all know :)

[@Ronnie10011]

Will these mods eventually be ported to 2.0?

[@SpeedyMouse]

I do not believe so unfortunately.

[@Ronnie10011]

​@@SpeedyMousesad, any reason why?

[@DumbProductions2]

Photogalvanic means not comparable so that would be really creepy

[@NinjaMaster-og8ti]

What's the name of the mod. I know it's made up of multiple mods but it would be easier to find if it had a name as a whole. Also I think it would be cool if the void Leviathan caused the players vision to go all blurry and have a heartbeat sound effect play in the background. This is meant to represent the player going insane and is a nice homage to H.P Lovecraft and Lovecraftian horror which often had showed how some things are so alien that the knowledge of its existence is enough to drive a person insane.

[@samedwardpasag2804]

I love how subnautica is still being loved by its community and still being modded

[@SpeedyMouse]

Me too! :)

[@NaughtyFart69]

the game is just different and original

[@DamageMaximo]

It's just an incredible 11/10 game, of course that will happen

[@engagingweirdo]

The creature add ons are what really make the mods stand out imo

[@WolfCry791]

I just wish you didn't have to play legacy to use them. I started in 2.0, and I feel like I'd lose so much. Plus, I can't even find some of the mods like Return of the Ancients. I wish 2.0 hadn't broken the whole modding scene

[@HorrorLover98]

The blood kelp eating like Venus fly traps is really cool, as if the blood oils are made from the blood of animals they catch.

[@sharondornhoff7563]

It makes sense that they would be carnivorous, given how little light there is for vegetation in that zone.

[@MrShadow-nf2cf]

I always thought that it looked like a mouth, and I would scream so hard I would poop my pants if I got attacked by a blood kelp because since I was a child, I had a big fear of plants!

[@jmacku35]

When we need him most, he returns

[@jmacku35]

Omg I spelt it wrong lol

[@jasehg]

@@jmacku35just edit it

[@rholvr09]

“I shall relish ending you… HERE. AND. NOW!!” -The reaper that saw me outside of my seamoth scanning cyclops fragments

[@-Z3R0-zp3gh]

Whenever I am out of my seamoth, they just grab my seamoth instead. 😭

[@neon_wolf3057]

the glass forest has a fanmade leviathan that went with it called the silence, im hoping that its in development because it was a really cool concept

[@ReikasMinecraft]

I have no idea what you are talking about.

[@neon_wolf3057]

@@ReikasMinecraft i only saw it on tiktok but it seemed like a cool concept, basically its texture is completely dark and you cant see it unless its in front of the kelp, and it would only make very quiet but aggressive sounds and attack randomly. idk if it was ever a real concept or not but it seems cool

[@ReikasMinecraft]

@@neon_wolf3057 I have never seen such a thing, which makes me wonder what you meant by associating it with the Glass Forest (which in all likelihood is newer than this concept art, as I first designed it last September).

[@neon_wolf3057]

@@ReikasMinecraft hmm then someone on tiktok must have seen it and made a concept off of it.

[@kurierdpd4586]

anthomnia or igp made a video about this leviathan. it basically doesnt really exist yet, but it can kill you already, your screen turns static (like in old broken TV's), you hear an eerie noise and just die lol

[@tectonic43]

I really love these mods, not only does it fit the game, but I love the new creatures. I feel like they fit the ecosystem and landscape of the biomes very well.

[@SpeedyMouse]

Yeah, I totally agree. It's not often you see mods where at least some components really seem like they would fit in vanilla.

[@the_doctor9744]

What are the mods?

[@MrBigGames495]

@@the_doctor9744 look in the description :)

[@engagingweirdo]

Can’t wait to see what the new Leviathan will look like

[@loganjohnsey5268]

Someone needs to add the Single Cell Biome to this game. It was a biome that was cut from the original game and it looks really interesting and horrifying.

[@stonerman4206]

Just wanna say thank you for uploading this video, for uploading all your other videos, for making a channel and just existing. Thank you SpeedyMouse. You’ve helped me and a lot of other people with your videos. You are easy to understand, funny, straight to the point and professional. Thank you

[@SpeedyMouse]

Thank you so much for this comment, it means a lot. I'm so glad you enjoy my videos and I'm especially glad I could help people out 💚

[@gregtheseatreaderleviathan4609]

17:18 perfectly cut screams

[@ReikasMinecraft]

Pod 10 has a lot of that. :P

[@otsdozz3753]

The fact that the subnautica community is still not dead is mindblowing to me and im happy about it

[@laughingcat6540]

i love how the mods added cut content like the single cell biome's mechanic of dragging subs down, and plants that react to the player by shrinking and attacking. the devs originally wanted to add this but decided not to, but then the modders come and do it anyways lol

[@ReikasMinecraft]

That was part of the inspiration for it. The other, arguably bigger part, was an experience I had in another game back in December: i.imgur.com/gwRq7mD.jpg

[@elizawulf8180]

I think this would work well if it could integrate creatures and assets from the De-Extinction mod (like the Gulper Leviathan instead of a Ghost leviathan)

[@thechickenmafia5315]

The blood kelp mouth thing is honestly galaxy brain. It makes so much sense!!! After all, it produces BLOOD oil. To expand on this idea, it would be cool if you could feed the plant fish (or youself, I guess) to get it to produce blood oil faster. And I guess thar would mean you can use the oil in the bioreactor?

[@SpeedyMouse]

Facts lol, it's seriously such a good idea. It definitely should have been in vanilla.

[@ReikasMinecraft]

I am going to add that.

[@prism182]

man i CANT wait for these big mods to be updated to 2.0 so i can make a massive mod pack

[@Nutrition_77]

With the alkali vines I imagine a precursor stash with a tunnel entrance in a similar vain to the huge coral tube in the safe shallows that’s absolutely lined with the stuff. There could be broken precursor structure parts and maybe a reaper skeleton, all revealed fully as the vines shrink away to add a more ominous/ mysterious atmosphere.

[@minecad2828]

Finally someome making a video about this mod that is actually about this mod and not 95% screaming at nothing and 5% interesting footage

[@Michaeltheman2436]

Bro just give him the love he works his self off so much to just make videos bro and that’s good cause there good actually

[@Aidanhex3]

I’m so glad u uploaded I doubt you’ll remember but ages back I asked on your discord if a new subnautica video was being worked on and you replied yes! Glad so see it out Amazing upload

[@blackchroma8847]

8:04 This image is actually early concept art of Soma by Frictionalgames. Would be interesting seeing them implant it in Subnautica.

[@WDEthan4364]

I've been subbed since your first stasis rifle vid. I'm glad to have seen you come this far

[@Sharksader]

I would love to see the atlas submarine or another void exploration sub to go exploring in the void with.

[@WarPoodle-pc5wu]

I love this mod series! Have it installed along with bloop and blaza and its soooo much more challenging and scary and fun!!

[@G-force_GD]

Wow nearly 100k dude! Keep up the good work!

[@SenatorMorbstrong]

Take a shot every time Speedy says: "Now this is something I could see in vanilla subnautica".

[@TodShort]

Damn, I passed out... 💀

[@phantomhurricane666]

a good mod would be one where kharaa actually does kill you, if you don't cure it within a time limit. (for a human, the incubation period is about a fortnight), and the timer starts from the first self-scan that tells you you're infected. for experienced players only. fun fact: Kharaa means 'cursed' in mongolian.

[@slijig7751]

Thank you so much ! I was tired of all my other games and I needed something new to play. I'm glad you showcased this mod! Thanks again !

[@SpeedyMouse]

Ayy no problem, glad I could help :)

[@affarinoxa]

Just had a random video of yours from 3 years back get recommended to me, the one about why life pod floatation devices didn't work. Cool to see you're still making vids and now your voice sounds so different. Good job kid, glad you're still putting effort into the channel.

[@banana-fr2kq]

I wish subnautica actually had these stuff

[@donchomp7042]

9:59 *puts the creature feeder maliciously right after placing the creature repellent

[@ReikasMinecraft]

They affect entirely different creature classes.....except for one species.

[@NeekoElijah]

I swear when even the pda entry doesn’t know what massive creature it could be, that’s what gives me chills

[@Sassy_Witch]

Subnautica modders be like "LETS ADD A BILLION LEVIATHANS AND MAKE IT SUPER DARK" like wow thats so fun

[@King-Matthew]

Photogalvanic fits the biome so well, would love to see another leviathan in game.

[@TheRohBird1]

I would love to see a full playthrough of this mod to learn about all its features and to help with finding all the important items!!

[@TheImmortalMushroom]

It sucks that the Void Spikes is dark because it ruins the view of such a beautiful biome

[@Cosarandominc1989]

Finally someone that plays sea to sea i been following the mod since january

[@XVI8.]

Sad to see the good old days go by so fast, I still remember your high Pitch voice from back then😅

[@Wthisakilometer]

We almost at 100k! I've been following since 11k and I am proud to see how much he has grown. I also love how much his voice has changed.

[@SpeedyMouse]

We are so close! Thanks for sticking with me for so long :)

[@isolatedegg3234]

I hope we'll be able to deconstruct the prebuilt bases. This mod is awesome

[@bigman7556]

AW NAWH BRUH IM GONNA HAVE TO GO INTO THE DUNES AND THE VOID TO PROGRESS GOD HELP ME 😭😭😭

[@eliplays866]

Ayy i remember watching this dude its been awhile but im glad to be back i was there while your voice was more high pitched

[@semajniomet981]

Imagine how many incompatibilities would arise if this were combined with Return of the Ancients!

[@M00Playz]

This really gets your hyped for Subnautica 3 and keeps us occupied till then.

[@Theguywhoasked994]

I can’t believe that modders do this for basically free, meanwhile mojang barely adds new features for Minecraft.😂

[@handledav]

there is no barley in minecraft

[@MyBallsHurt362]

nuh uh they added a silly seed cow

[@Theguywhoasked994]

@@handledav that’s actually pretty funny

[@mikoajciemiega8018]

Chad modders: making mods that sometimes reach the size of a new game completely for free and with amazing quality Virgin game studios: adding 3 things, fixing 3 bugs and creating 15 new ones having billions in budget

[@BridgeOfInsanity]

Well, I think that's partly because subnautica's player base is a lot more enthusiastic about there game, than minecraft's player base.

[@TodShort]

Imagine you put down that plankton feeder thing while you are in the grassy plateaus and the next day there are ten Reefback leviathans near your base. 💀

[@chase8360]

Props to the moders that make this stuff especially that item display It looks really nice that kyanite crystal. What if you can put the alien rifle in there or your scuba gear like a Minecraft armor stand?

[@OrionEJ]

Since I'm NOT downgrading to legacy, I can enjoy this video to the fullest.

[@func_e]

it'd be nice to have a more in-depth look into what all the different base pieces do. that part of the video left me wanting. never just "presume" that something does something. test. maybe work on that next time. the rest of it was great, though! you've got a real eye for good mods :D

[@SpeedyMouse]

Yeah fair enough, I tried to run through everything quick so the video wasn't way too long. You can always download the mod and check for yourself (if you're on Steam) I suppose. And thank you, glad you enjoyed the rest :)

[@func_e]

@@SpeedyMouse that's also true, but in all honesty, it feels hardly worth listing all the items off if you'll just skip by most of them. You are a very talented creator, and I'm just trying to give some advice from a viewer :D

[@agamerdude7596]

makes me wanna go play subnautica again.

[@SpeedyMouse]

Do it! It's worth it ;)

[@yilmazb12391]

All these makes the game even more beautiful, i hope they bring these things in Subnautica 3

[@squibydoesalittletrolling]

every time you go to 1k meters in the void there should be 2 or 3 leviathans with you to hype up the abyss monster a bit more

[@gingerjammy5849]

Bro thought we wouldn't notice the Titanic Sub... 4:00

[@FelixVerch]

Finally! Spedymouse is back!!!!!

[@TheLastBacon]

Yo! Welcome back!!!!! Banger vid :)

[@SpeedyMouse]

Ayyy thank you!! :)

[@REDOMTF]

That what i'm TALKIN about the GMOAT (greatest mod of all time) THE GMOAT

[@rahjiemoconnor2352]

THIS game is so fire but i cant buy it on my ps5 and i miss you uploading vids im glad you came back

[@Logttt]

amazing vid, as always!

[@SpeedyMouse]

Glad you liked it :)

[@Sunnyhollow]

THE KING IS BACK

[@TF-Boom]

Now magine playing this mod collection + deathrun mod on hardcore.

[@nikoldol]

18:16 this could be the base built by Margharite from subnautica below zero as she is the second survivor of the aurora crash and has never left 4546B

[@Ionstorm2002]

Meanwhile the Garg just says thank you for the snacks dear player.

[@Ghfgkgkghkghf]

The return of the king

[@jasehg]

Man I just woke up and I get more nightmares😂

[@baronofluck2163]

Space bobbit worm, oh lawd

[@logantube8970]

thanks for posting an amazing video again.

[@tristensassenger9164]

Dude i remember when your voice was high but not annoying, look at you now man, crazy stuff 💙💙

[@regalpitt]

Speedy is back!

[@soapfaces]

No way, the speediest mouse has returned

[@denifnaf5874]

I've seen some great new wbiome mods But it would be cool to get a mod of a brand new map entirely

[@america2793]

Excellent video :D

[@SpeedyMouse]

Glad you liked it! :)

[@america2793]

@@SpeedyMouse :D

[@eji9617]

Where do you find Iridium in the Sea 2 Sea mod?? You need it to build the PRAWN and I can't seem to locate it.

[@FrostyTheNightmare]

I'd love to see the Photo levi fight the Garg or Adult Garg Clash of titans stuff

[@mimikyubutitsactualyhornet]

Bish you made me so excited becuse i didn't read "(mod)" at first

[@_Wanky]

Holy shit this mod is awesome, I can't wait for the leviathans to get their models

[@Rainas_omniverse]

You should try to beat the game with this mod on a stream/video at some point

[@phantomhurricane666]

undersea currents were in the pre-release build. for some reason the devs removed them.

[@REDOMTF]

Keep the work up with video's 👍 have a nice day/night

[@SpeedyMouse]

Thanks! You too :)

[@henryhere]

4:03 this literally used to be my Gmail background XD

[@ashersmasher3659]

Speedy the GOAT

[@mr.berserk_mike3412]

Man you had a really big glow up in two years 😂😂😂

[@vannyblutea]

ayyy arent some of these old subnautica concepts?? that water current espetially

[@hannahtgp9421]

Damn watching u after 2 years and damn u just aged cooler like wine

[@TylerNinjaFortniteBlevins]

The fact that the blood kelp trees were inspired by bobbit worms, and now act more like them with this mod, makes them just, gross and horrifying

[@Mermererererererer]

Im still waiting for modders to add the single cell biome at the bottom of the void

[@scam8427]

Playing subnautica now this out KZbin, it like look horror movie in night in 3 am;-;

[@A-real-nerd]

Next you should do sock's newest mod, its huge abd adds to the story, biomes and creature and even materials

[@SpeedyMouse]

Lol the video on it should come out later today 😉

[@Fervans]

V much love for Subnautica

[@commander_jat0580]

i would love if the void tentacle creature is never going to be seen, only its tentacles. it would add to the fear of the unknown.

[@ReikasMinecraft]

That is the plan.

[@SillyShark_VR]

YESSSS HES BACK!!!

[@SEB9630_pl]

just saying about currents, they had currents in one of earliest versions of subnautica, tought i have no idea why would they remove it, currents were cool

[@TW0S1D3]

woah speedy your voice has changed so much

[@boi2192]

Havent watched u in ages, now u almost sound like a different person

[@fragment5811]

THE GOAT IS BACK🔥🔥🔥🔥

[@devonthompson891]

Hey speedy when are you gonna finish the x10 stream for Subnautica

[@Fras64]

HE UPLOADED AGAIN!

[@DiegoMorales-wn1jp]

Fuck. I'm installing this game again.

[@agrimsuman2157]

Fuck, those are some nice mods

[@lost-Eclipse]

holy crap man your voice got deep

[@spinalchief96]

If i had a PC i would explode it with subnautica mods

[@CommonPainW]

I was wondering whether I should repurchase the game for mods, now I really want to

[@SpeedyMouse]

You should, it's worth it :)

[@mertbince6582]

Is there any full gameplay videos made with this mod

[@ReikasMinecraft]

The mod is large and new, and not THAT popular. I doubt it, at least yet.