Spider Riders: Battle for Arachna was a web browser RPG based on the anime series Spider Riders, itself an adaptation of a series of novels. The game's Combat consisted of players rolling dice and using a deck of cards they assembled in turn-based battles. It featured a customizable avatar character and spider, 15 single-player missions, online play, and a Guild system, where players would align with one of four mentors to compete and amass the most points during recurring events.