Amnesia: The Dark Descent has a few good tracks. Amnesia: A Machine for Pigs has a larger library of great ones in my opinion. https://jessicacurry.bandcamp.com/album/amnesia-a-machine-for-pigs FTL: Faster Than Light is pretty good. A lot of people have already recommended Undertale, but there are a lot of songs in the game that don't appear on the official soundtrack. They're mostly just different versions of already existing song, but they're still really cool. Here's an example: Even Minecraft has some pretty good tracks. https://c418.bandcamp.com/album/minecraft-volume-alpha Hope you have fun with those.
Here's a story that I heard from World of Warcraft. At the time, people only cared about the Ahn'Qiraj raid for the final boss. The raid itself took an eternity just to get there, and if the group wiped, that was a huge run back to the boss. One guild found out a way to alter the game files to remove a floor under the first boss, as the final boss was just down there. Everyone who used this trick got a permanent ban.