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