Logically, these must be hell of a repayable ones.
Not necessarily my favorites, but a really nice list imo
Minecraft
The Binding of Isaac Afterbirth+
Skyrim
Diablo 2 HD
Warcraft 3 TFT +tons of custom maps
My personal must-haves
Psychonauts (though choice between 1 and 2, but I feel that 1 is more cult classic)
NFS Most Wanted 2005
Minecraft (with a juicy mod like TPPI or the 1.12.1 pack)
GTA SA (even tho VC is my fav, SA has more stuff to do)
WoW WotLK Azerothcore Single player.