SotM: The Video Game Promo Unlock Spoilers and Theories (SPOILERS)

Just unlocked SST. First turn - put 5 burst cards in trash.

 Fleet of Foot, Fleet of Foot, Quick Insight - Discard Sucker Punch and Accelerated Assault, got the unlock

Got Young Legacy unlocked!  Like people had guessed, it was about having Blade incap Legacy, but since that didn't work for others, there must have been more specific conditions that my game met.  To help with that, here's a quick info dump about what happened that unlocked her for me.

I stacked the fight to be as close as possible to what the wiki says about the fight where Legacy was killed, so it was at Wagner Mars Base and the rest of my team was Fanatic, Tachyon, and Tempest.  The actual damage that killed Legacy came from Blade, so you can't just have Tachyon Lightspeed Barrage him to take him out—though you can whittle down his health with other heroes so that he's prime for Blade's attack.  The variant unlocked immediately after Legacy's death, so it's not about beating Blade afterwards, it's just about Legacy being incapped.  It does not have to be on Advanced, mine was just a regular Blade.  Someone mentioned Next Evolution, given the art, and while I did have that out, I had not used the power at all during the game, so if it was relevant then it was presumably just about having the card in play when Legacy was incapped.  I don't know if it's significant, but the damage that killed Legacy was redirected to him through Lead From the Front, so if these other conditions aren't doing it for other players, it's possible that's important.  I wouldn't be surprised for any of those to be necessary/key to the unlock, as they all make thematic sense, but I'll have to leave it to others to test and see what works for them.  Good luck all!

Just unlocked Young Legacy.  Redirected Blades attack to Legacy via Lead from the front to incap him.  On Mars base.  Didn't have next evolution out.

It didn't work for me when I wasn't on Mars. It did work when I was on Mars.

I just unlocked Super Scientific Tachyon.

My conditions were HUD goggles on the field.

During the play phase, these were the cards I played in order:

Fleet of Foot, Nimble Strike, Quick Insight (discarded Sucker Punch and Supersonic Response)

Unlocked the promo right before the Power phase.

So far I've just managed Bunker.

Ahh so I had the right idea just the wrong location with getting Legacy uncapped.  Should've put that together.  

Same game I opened Super Scientific Tachyon, I opened up Young Legacy.

Game notes:

Baron Blade vs Legacy, Tachyon, Visionary, Bunker, Wraith 

at Wagner Mars Base.

 

Baron Blade killed Legacy through Backlash Field redirected via Lead from the Front on Visionary's turn after I used a Mind Spike.

Legacy was at 2 health before the Backlash Field triggered. On the field was Inspiring Presence, Legacy Ring, Lead from the Front, Next Evolution (triggered for Fire immunity)

 

Young Legacy unlock notice popped up. Then the Mind Spike card went to the discard pile. 

I can confirm that the following conditions should exist:

1) Lead From the Front is out.
2) You are on Mars Base, fighting Baron Blade

3) The last damage done to Legacy must be from him redirecting damage away from an ally, using Lead from the Front.

This unlocks Young Legacy

Same game I opened up Super Scientific Tachyon and Young Legacy, I opened up Rook City Wraith


I had Mega Computer x2, Micro Targeting Computer, Infrared Eyepiece x2, Utility Belt.

Power phase: Infrared Eyepiece, Infrared Eyepiece.

After I drew the card for the second Infrared Eyepiece, Rook City Wraith unlocked.

Then drew my card for the Draw Phase.

Confirmed what was on the BGG forums for unlocking. Infrared Eyepiece x2 on the field using both the powers in the power phase.

 

Currently testing Bunker's in the same game.

If it takes 2, she should have goggles like Tachyon's.

I got SST and RCW on my first attempt! Yay!

And just opened up GI Bunker in the same game. (So yes it is possible to open up all 4 variants for the heroes in one game).

Confirming what was on the BGG forums about playing all three modes in one game.

Turn X (I don't remember what turn number it is right now): I have Grenade Launcher, Flak Cannon and Ammo Drop in play.
Play for this turn was Upgrade Mode, Recharge Mode.

Next Turn
Destroyed Recharge Mode at the start of the turn.
Played Turret Mode.

Game notified me of unlocking of GI Bunker before the end of the play phase.

Yup, all the stuff on BGG works great, got all four heroes unlocked. Now I really want some Mad Bomber Blade in my life . . .

Lead from the front isn't necessary to unlock young legacy, at least on my game. Blade just needs to incap legacy on Wagner mars base.

Is the bio information for the promos new, or have I just forgotten reading it previously?

So I just got mad bomber blade! Fought citizen dawn and wiped out all the citizens in the first round of combat. Maybe that did it? Was in megalopolis if that matters.

Don’t know if the significance is on the villain flipping in the first round on that stage or some combination of occurrences. Was using sst, young legacy, fanatic and haka.

Tried that, and nothing. Maybe it's about doing a certain amount of damage in one round?

Weird. I’d post my unlock pic but the file size is too big. I can’t think of anything else significant, other than blood sweat and tears were all in play together.

Also a correction about dawn flipping. Obv only 4 citizens in play with my group so no flip. My bad.

Got Mad Bomber Blade myself now. Awesome!