1. Bioshock - It's essentially perfect, the only downside is I can never play it for the first time again.
2. Inscryption - It's an odd choice, since it's pretty meta, but it's a game that I think about too much to live without.
3. Doom - Purely for historical relevance, which cannot be overstated in this case
4. Legend of Zelda: Ocarina of Time - I spent an embarrassingly long amount of time going back and forth between this and LTTP, but Ocarina also represents maybe the best year in game development history so it gets the edge.
5. Slay the Spire - Basically the same argument as Doom - this game is a fork point in all development trends for at least 5, maybe 10 years after its release.
Yeah, I wasn't really clear in my language. I was saying that STS has steered the last 5 years, and might continue to steer it for another 5. I wouldn't say we done with STS still influencing pretty much every other indie title released right now.