Very nice keropi you rule!
I have a few of them myself like Dungeon Master II, GOB1-3 and Shadow Warrior, awesome game! "You no mess with Lo Wang"
3DRealms released a free add-on pack, Wanton Destruction long after the game was out, you can download it freely
Psygnosis Intertaintment Pack from 1993 containing Obitus & Atomino