Unlock all the perks. Fallback has no secret for you.
THE GREAT SURFACE
Finish the game. Congratulation you did it - you saved the world.
Unlock the Plumber. What a nice guy.
Unlock the Biochemist. Let your ennemies rot!
ALPHA EXPERIMENT DOWN
Unlock the Holomaster. Now you see me, now you don't!
Finish the tutorial for the first time. At least you didn't die yet.
Ah that's it you died... Didn't take you long.