Project Nimbus is a 2.5D mecha scifi shooting game. Developed by GameCrafterTeam, powered by Unreal Development Kit.
One of the first BattleFrame and one of the most widely used nowadays. It's very durable, very easy to maintain and very cheap. Rumor say even it's left in mud for a year, it's still usable. Parts can be found easily in the black market. This make Strelki favorite among mercenaries, warlord and the anti government troops.
There're several variant of Strelki. Each fitted for different type of role. In this picture, these are the rapid fire revolver variant, beam rifle variant, and missile launcher variant.