I saw a clip of an Android game called Dead Trigger 2, and this particular automatic weapon had the same skin as the scar camo in C2(with the hexagons), the weapon itself looked a bit like the Gauss and had the Scar Reflex Sight(C2) and a Grendel-looking magazine...

Recently I was watching a commercial of this hair product from Elseve and I swear at the end I was hearing the Hydro Dam soundtrack from C3(parts from it).

There is a game for android called NOVA3... and it's actually a Crysis2 for android. Just watch some trailers and you'll see.