These are the best games of all time.
The Witcher 1/2/3
Tactical fighting games. Very deep, clearly made by people who have read much.
Story-based RPGs with great modding support. Skyrim is not listed because the dragons are too small and it's kind of dull. However these games are fantastic.
Master of Orion: Conquer the Stars
A worthy successor to moo, moo 2, and moo 3.
Red Alert 3
The Binding of Isaac
Probably Turing complete, if I had to guess.