Reapers are an aggressive race of bipedal, muscular reptile-like beings with a dozen spikes upon their back.
They had the ability to shoot said spikes out from their backs. These spikes would be fired in an arc toward Ratchet and are difficult to avoid. They would also spit up acid at close range.
Secret Agent Clank
Reapers were fought in by Ratchet on the Prison Planet. There were also Elite Reapers; bigger, elite versions of the Reaper.
Behind the scenes
Reapers, according to their developers, were based off crocodiles, simians and porcupines.
A Reaper was playable as a skin in the multiplayer of Deadlocked.
- Ratchet: Deadlocked: Prima DVD