As part of a series released by Road Champs in 2002, OverKill was 1 of 4 robots used in the first 2 editions of Battle Chains . These toys were smaller than most other BattleBots toys, in order to fit on a keyring easily. When a chain on the back of the toy was pulled, the weapon would activate. In the case of OverKill, when the chain was pulled, the knife blade on the back of OverKill would swing. Oddly, the logo of OverKill is upside down and the toy is the only one of the wheeled robot replicas in its series to use its actual wheels for movement instead of the tiny ones given to the BioHazard, Ronin, and Mauler Battle Chains.