Dungeons and Dragons (Basic, 1st, 2nd, 3rd, 3.5, 5th)
GURPS (from Man to Man to 4th)
Tunnels and Trolls
Fantasy Trip
Top Secret
Gamma World
Champions (all of them)
Traveller
Star Trek (Fasa)
Doctor Who (Fasa)
Call of Cthulhu
Ringworld
Stormbringer
Timemaster
Space Opera
Jorune
Aftermath
The...