Valkyria Chronicles - Barious Desert Expert Skirmish [1 Turn]

Alternate clickbait title: "This level takes over 10 real-time days to beat in one turn!"
The excessive length comes from waiting until tanks explode from other enemy interception fire. The worst offender is the easternmost Tank Destroyer (the one that removes the first two Tank Destroyers and the Scout) -- given the awkward angle from the shooting Tank Destroyer to the target's radiator, it takes roughly ~5-7 minutes to deal 1 HP of damage!
The first two tank destroyers are done in parallel and are a bit quicker -- 1min/HP and ~2.5min/HP. The last one goes at a much faster clip, at ~15 HP/min. With 1900 HP per tank, you end up breaching 240 hours of idle time to move things along.
(These values are a bit rougher than they could be because I unfortunately lost runs with actual clock timings, so I sped the tank explosion waiting when redoing the runs.)
Other noteworthy tidbits:
Engineer/Demolition Man potential
Blowing up the Shock on Action 1 greatly simplifies Actions 3 and 4. If that Shock is kept alive, he will go North toward the middle of the map/the Engineer, so we'd have to have a unit ready to intercept.
Achieving that would involve:
1. having the Engineer make a detour during Action 3 to just barely defeat the Scout hidden by the rocks with 4 body-shots before lining things up to have first the Anti-Tank Cannon and then the Tank Destroyer explode from the top Tank Destroyer interception. (There isn't enough AP to extend the detour enough to allow for the Engineer to go for a headshot, so it'd have to connect at least 4 body shots out of 7 -- a less than 5% chance for all eligible Engineers.)
2. Wavy would have to blow up the Tank Destroyer from the natural rock wall formation (there's barely a spot to line up a small section of the radiator) and then head back down to be ready to intercept the Shock, with enough HP to survive a flamethrower hit. This would also involve a 4/7 shot success rate, which is again a less than 5% chance for Wavy.
...All that said, it is very convenient that the grenade blast radius is enough to hit the Shock on Turn 1, and that Claudia has both Demolition Man and Invincible (the boost from Demolition Man is needed to actually defeat the Shock).
Clipping/Team Attacks
The other important trick here is abusing team attacks and clipping through objects. When initiating team attacks against tanks, supporting units will aim for the radiator if they have line of sight. Conveniently, the radius for initiating the team attack is large enough so that the supporting unit can be behind a tank destroyer while the initiating unit can clip through the tank while still having the cursor stay on the tank ("open white crosshairs" usually indicates that the clipping is successful). This is used to set up the two two-tanks-with-one-action team attacks with Alicia and Aika.
Some other fun details that made this viable:
- There are exactly three Scouts that have Double Movement and Resist Crossfire, and we end up needing exactly three. The former is needed to position units, and the latter is needed to stay alive through the interception fire of the middle Scout and various tanks.
- Alicia's "Valkyria" potential increases anti-armor damage enough to be able to manage the two-tank explosion with a carefully lined up shot, and to make the last team-attack a bit more feasible.
- Alicia's Mysterious Body makes it possible to be able to get into position for said team-attack while being able to step off the mine and get into position for the enemy phase.
Action-by-action breakdown in the below pastebin link (I'm still not entirely sure about the "enemy AI targeting" note or whether it's (also) a distance thing that makes the enemy Sniper attack Alicia instead of Aika, but hey :p):
pastebin.com/a...
Satisfying to put this all together to make a (pretty ridiculous) 1-turn strategy!
(Technical notes: This is the PC version running 1280x720 windowed at 60 FPS (60 Hz monitor; framerate at "refresh rate"), VSync off. [Evasion seems to sometimes get really wacky/buggy if the game isn't run at 1280x720, hence the lower resolution.])

[@tomato3456]

After 10 days, you'd think they'd realise that bullets aren't gonna cut it. Fantastic work

[@nin10doadict]

That's nuts. Using every little thing to put together an incredible run~

[@cheeseoman]

Awesome! Those team attacks were great.

[@nomorenevermore]

those imps wasted a year worth of ammo supplies to claudia's body without result

[@cheeseoman]

I noticed on the Statistics page that you also beat Kloden Wildwood Expert in one turn. Any tips for that one? I've been working on it for a while with no luck.

[@dainegai]

So, not exactly the most timely reply here (:P). But for posterity/in case there's still interest: I remember following a Nicovideo walkthrough that involved damage-boosting over the barricades using grenades. I believe this was the video I used as a reference: www.nicovideo.jp/watch/sm4363226 I remember it being _very_ particular/annoying to make the damage boosts work. Was a mindless ~1-2h, had put some music on, would sometimes try repositioning Welkin to find the magic grenade angle -- that sorta deal. (I _think_ Welkin successfully "teleports" over the barricades if his ragdoll arc makes it over the first layer of barricades without touching them at all. Then perhaps he touches a barricade on Homer's side, and the game thinks "oh Welkin must have come from Homer's side, let's teleport him there".) Funnily enough, in the hardcoded video commentary, the Nicovideo uploader says essentially "this may look easy in this video but I had to retry a ton of times to get this to work". I don't remember if I had framecapped the game to 30FPS -- I _think_ I was able to make it work on 720p@60FPS (like this video).