[PC][2010-2014] robot fps shooter where you have enemies over cover(?) and you kill them and upgrade your gun.

The graphics from what I remember are reminiscent to a smooth/cartoony look, kinda like borderlands 3 but without the heavy outlines and cell shading specifically imagine the texture of Claptrap's front metal panels but in a blue gradient. I remember a blue robot being important to the story. I remember vaguely that you could upgrade your gun in way that was similar to Mothergunship where its modular. The setting I think was in a scrapyard at the beginning. I was very young at the time and cant remember much more details.