OK, let's see if I get to 10.
- Factorio - easy first pick, it's not even a contest
- Kerbal Space Program - now I have already enough for the rest of my life 😅
- FTL (with Mods)
- Civ V - haven't played in a long time, but I guess it'll fill some hours again
- Oxygen Not Included
- Cities Skylines
- Deep Rock Galactic - I'm not too much a shooter player, but something different for the list
- Valheim
- Minecraft/Luanti - never really played those, but I guess there's a lot to do in it
- Flight Simulator - I am not sure of that one
Maybe some Paradox Grand Strategy instead of Flight Simulator...if I'd have to chose probably Stellaris or Europa Universalis