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.