Because some questions might be often asked, I’ll note the answers down here.

Q) I don’t have the reward for a bad ending! Are they bugged?

A) You need to make sure you start a new game after getting the bad ending, and not load in a manual save file as that will override the checks which tell the game if you completed an ending. This may be why you don’t have them.

Q) Where are these endgame items I need?

A) There’s a total of seven of them, of which one can be seen easily close to where you start, and three more are hinted at if you have the Generator on hand. You’ll know if an area might have one if you look hard enough…

Q) How do I get past the keycard doors?

A) You need to find a keycard of the right strength to unlock it. They go, in order of strength, Grunt -> Executive -> Admin -> ??? - and you should be able to get each of them in order. However, some keycard doors can be bypassed through vents… If you don’t mind getting dirty and losing time from crawling through them.