The Cyborg Reaper's existence was considered merely a rumour by the time of the Second Tiberium War. Nod secretly designed the Reapers, with very few people aware of the project. When CABAL started a rebellion against Nod and GDI during the Firestorm Crisis, all cyborgs, including the never before used Reapers, pledged their allegiance to CABAL, ignoring Nod authority completely.