Steam Please recommend games for very weak PCs

My eecommendations:

-GTA: San Andreas
-Counter Strike 1.6 (I think it still has a very active community)
-Age of Empires 2
-Serious Sam (Any of them)
-Grim Fandango / The Secret of the Monkey Island
This games are classics that will never get old

This games are little gems not a lot of people know but I really enjoy a lot

-Papers Please.
-Return of the Obra Dinn.