X-Risks details the dangers facing transhumanity: Over 60 creature and machine descriptions, classified by challenge level.* Information on extinction threats, from AIs and aliens to nanoplagues and wormholes.* Coverage of the TITANs, exhumans, exsurgent virus, Factors, and other hostiles.* New exsurgent virus strains, psi sleights, and xenofungi.* Traps for high-tech dungeon crawls.*