Here is the full list of all 15 Lifeline achievements.
Find an ending where Taylor survives.
Find Taylor’s rats and feed them the pellets.
Find the Chinese writing on the wall.
Help the enemy by tossing a glow rod for the incoming Greens.
Find and take the pain pills.
Eat the chili mac ration.
Pay respects to the casualties of the crash.
Rescue Captain Aya.
Go all the way back to the beginning of the game and try again
Kill Taylor for the first time by reaching a dead end.
Reach a dead end in the game and kill Taylor 10 times. Poor Taylor.
Reach a dead end in the game and kill Taylor 15 times. Poor Taylor.
Reach a dead end in the game and kill Taylor 25 times. Poor Taylor.
Play from start to finish without killing Taylor.
Complete the game without fast mode.