Finish the game in "ghost mode". Never detected by any kind of enemy.

Finish the game using only the Power wrench and the HyperBroom as weapons. (never kill any enemy with other weapons)

Finish the game in "no-hud" mode, so never use a helmet in one entire playtrough.

Buy all the Mutamods. (at least on level 1)

Buy all the tech-gadgets. (at least on level 1)

Upgrade all your weapons to the maximum.

Explore all main sections of the station.

Play through the game without killing anyone. (including robots and turrets)

Kill at least 5 from every enemy type in the game. (bosses not included)

Find all audio logs in the game.

Finish the game without spending any money in vending machines.

Get 50 kills by headshots.

Finish the game on any difficulity.

Finish the game on 1999 mode difficulity.

Finish the game on Russ Kurtell difficulity.

Reach the "Good" ending.

Reach the "Bad" ending.