During it's earlier versions, Syphon Filter: The Omega Strain had various weapons and usable equipment which was not fully and "officially" included in the definitive version of the game, in addition, certain weapons had a cosmetic name change (such as the G11 - C11 example), many of these weapons were meant to be normally used in game but were later dropped. During Omega Strain's public Beta Version some of them could be normally accessed and used.