Dune The Dice Game is a free print-and-play game set in the world of Frank Herbert’s Dune Universe. It is inspired by the old Avalon Hill game.
Anaxis is a free space wargame, played on a hex grid with ship counters.
Set in the world of Frank Herbert’s Dune, The Art of Kanly is a card game where players try to win through bluffing and deception.
Issue 14 of Ares Magazine featured a game called The Omega War, a two player game of strategic warfare for control of North America in the 25th century. Issue 14 came out in the spring of 1983.
The first issue of Ares Magazine featured a game called “WorldKiller, The Game of Planetary Assault.” There’s also an interesting article on the “most significant science fiction and fantasy games” by (among others) Greg Costikyan. It’s a nice little piece of history and a glimpse to what was state of the art nearly forty years ago.