Ah, Alien: Isolation. A game I could have loved, were it not entirely about something I hate.
Walking around such a faithfully-recreated version of the original 1977 film's universe was great! Being chased the whole time by a giant monster was not.
Well, sort of. The Alien is still in the game, but by changing some code it leaves it stuck inactive inside a vent, where it can't trouble you or interrupt your casual explorations of one of gaming's great virtual spaces.
You can download the mod here, but be warned: while the Alien is nerfed, everything else in the game that can kill you can still kill you.