The Christmas Ultimatum comes from Pixel Gun 3D, where it arrived as a heavy weapon in the game's 13.1.0 update as part of the Cyber Santa event set. Alongside the Laser Assistant and Dual Cryo Pistols, it formed a festive collection that rewarded players who collected the full set with resistance to poison, bleeding and burning effects. Players often shorten its name to CU or X-mas Ult in clips and discussions. Its distinctive reload has since become a recognisable cue in fan edits, weapon showcases and short gameplay videos shared online.