crusader kings 2 (it's old but gold and it's free now since ck3 comes out this year)
rising storm 2
stellaris
rimworld
deus ex human revolution or mankind divided
boderlands 2
cities skylines
ark
prison architect
war thunder (big ol recommend if you're into ww2 planes)
witcher 3
Hi, @Madda @Cole @Collier @LEWIS 088 @Exnem @McGlinchy, @Super_ and I are currently playing Arma 3 - KP-Liberation, and we are in need of more players, The map is Altis so no special DLCs are required to play. Interested? Send me a forum PM.