- Sonic the Hedgehog 2 contains data for a cut level called “Genocide City”
- Obscure Wolfenstein clone Corridor 7 randomly jumpscares the player with a red demon face during regular gameplay
- Dog Island, a Wii game in which all the characters are adorable chibi dogs, has a subplot about a doctor whose botched treatment caused the death of someone he loved many years ago. He still sees her in his dreams, unable to let go or move on.
a mistreated freelance artist included a little shrine to his girlfriend in the halo 1 map boarding action
in the shrek 1 game if you fall out of bounds you get teleported into a small area where the escape menu is disabled, the only way to leave is to turn off the console. on the xbox version you get put into a weird, tiny chicken purgatory. on the gamecube version it’s a little gamecube.