Skewed towards my taste in gaming, but still trying to think about humanity:
- UNDERTALE. My favorite videogame OAT, amazing storytelling, characters and soundtrack. This is my least replayable pick, but one that I would not want to lose
- The Binding of Isaac. Contender for the best Rougelike ever made, with an absurd level of replayability and great modding community
- Minecraft. Even though i don't care about Minecraft that much, the things that this game has accomplished is crazy. I would not want to lose Redstone or the amazing modding community it has. Tons of ways to play and, it's the most purchased game in history, I think it's worth perserving.
- Geometry Dash. I would not want to leave the "rithym game" (debatable) community with nothing. GD is also a game I'm super in love with. The community is great and at this point it's close to being its own gaming engine, so I think it fits here.
- Skyrim. This game I haven't played ever, but I know what it means to a lot of people. Considering the rest of my cartoony and slightly niche picks, I think having one, extremely moddable medieval single player helps to have variety.