The initial version of the freeze gun was likely developed during Victor's research at GothCorp. It was primarily intended for scientific purposes but was later modified for use as a weapon after his transformation.

Throughout his criminal career, Mr. Freeze continuously modifies and upgrades his freeze gun, increasing its power, range, and effectiveness. He experiments with different types of freezing agents, delivery mechanisms, and targeting systems.

Mr. Freeze uses his freeze gun to freeze people, objects, and entire areas, creating obstacles, disabling security systems, and incapacitating his opponents. The weapon becomes his signature tool for committing crimes and battling Batman.

Mr. Freeze also utilizes his freeze gun defensively, creating ice barriers, shields, and projectiles to protect himself from attacks. He can quickly freeze surfaces to create slippery or treacherous terrain, hindering his enemies' movements.