OK, let’s see if I get to 10.

1. Factorio - easy first pick, it’s not even a contest
2. Kerbal Space Program - now I have already enough for the rest of my life 😅
3. FTL (with Mods)
4. Civ V - haven’t played in a long time, but I guess it’ll fill some hours again
5. Oxygen Not Included
6. Cities Skylines
7. Deep Rock Galactic - I’m not too much a shooter player, but something different for the list
8. Valheim
9. Minecraft/Luanti - never really played those, but I guess there’s a lot to do in it
10. 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