The Arachen are an alien species in the 41st Millennium.
Male Arachen’s were said to blade-legged with strange martial abilities. They also came in various sub-species:
- Oestromystics: Female Arachen that laid tangleclutch traps to catch victims for their egg-sacs.
- Grandfathers: Giant Arachen.
- Skitterlings: Small Arachens that attacked in swarms.
The Arachen were one of the few races that rejected to join the Tau Empire. Instead they responded in driving the Tau from their territory. A brutal multi-year conflict known as the Veil War, ensued with the Tau. A young Commander Farsight was able to claim victory over the Arachen by assassinating their leadership while Commander Dawnstone was launching a final offensive. The plan worked and the Arachen were drive out of their territory.
The Arachen traveled through space in cocoon-like ships. Their nest-cities were designed as mazes, which made fighting through them extremely difficult. They were led by a group known as the Arachen Trinity.
- Codex: Tau Empire (6th Edition)
- Farsight Enclaves: A Codex: Tau Empire Supplement