Fallout: New Vegas. Vault 11
So it starts like most other Vaults. Something went horribly wrong and Vaults have good loot. Your fighting weak radroaches and probably thinking that this is a low level Vault, then you get to the Overseers office. Now to the games credit if you were reading the computers and posters up to that point you most likely guessed that there was something bad down there and the "go to the light, the light is your friend." speech doesn't help either. However there are 3 factors keeping you from walking away.
A)Everything you have seen up to this point; the enemies, the location of the vault on your map, the "loot", all pointed towards this being a low level vault. Quite possibly the first one you would explore.
B)The "loot". The best stuff is the always at the end.
C)The NEED to know. What is down there? Does it still work? Well I could save right here and go.
So you went. You walked into the light, sat down, and watched a video about everyone's roll in life. . . . then the walls drooped down, the exit locked and robots shot you from every direction. If you were not equipped to fight those robots and at least a level 16-17 (estimate), you died, and God help any companions you brought with you, especially in Hardcore mode. The Pulse gun helps, but the only place to get it is Vault 34, which is not a cakewalk and requires a 100 lockpick.
So lets say you beat it, what was your prize? 500 exp. and some robot stuff.
. . .
Fuck you game.