Alternity is a Science-Fiction "Role Playing Game" featuring Dark Matter (modern day conspiracy), Star Drive (futuristic space opera), Gammaworld (post apocalypse science-fantasy), Starcraft (futuristic alien warfare), Fantasy and Tangents (everything else). Thousands of sourcebooks, expansions, PDFs, modules and resources - covering species, vehicles, weapons & armor, spaceships, short stories, cyberware, adventures, campaigns, character artworks, star maps, articles, characters and new rules -