[Mobile] [2010s] a mobile shooter game where you are a robot protecting a base/core

Platform: mobile/android

Genre: third-person shooter

Estimated year of release: somewhere near 2010

Graphics: 3d and kinda low quality

Notable characters: a spherical robot, and a humanoid robot, both playable by the player

Notable gameplay mechanics: wave based combat where you have to protect a base/core, a melee attack,has can buy and use different guns that have 3 types of ammo, and can buy new characters that have different skills

Other details: the game was deleted