The games discussed at /gt/ include memes (lame ones universally hated by everyone there, except a few trolls who control everything) involving such futuristic factions as:
Space Marines (the all-female daughters of the Goddess-Empress)
Sisters of Battle (all-male priests of the Goddess-Empress)
Other races include the Tau, a capitalist society with orange skin and orange blood, the Tyranids, a race based on zerg, although a small number of trolls claim otherwise, and the Eldar, a faction dedicated to destroying all things weabboo, with helmets shaped like vaginas. Their leader, Eldrad, is known to be a pussy.
FATAL is the most commonly played PnP on /gt/, although less mainstream PnP's are played when /pol/ comes trolling.