Cosmic Coliseum Achievements Full list of all 25 Cosmic Coliseum achievements.The base game contains 21 achievements, and there is 1 DLC pack containing 4 achievements.Filter Achievement View View Image viewList view Sort by TrueSteamAchievement desc TrueSteamAchievement asc Achievement name desc Achievement name asc TSA Ratio desc TSA Ratio asc Gamers desc Gamers asc Steam order Date won desc Date won asc DLC Packs Group DLC packs together in list DLC Filter AllOwnedNone What are achievement flags? Click to find outApply Base Base Game (Excludes DLC) 210 21 10 (0%) Velox MasteryBeat the final boss with Velox Calidus MasteryBeat the final boss with Calidus Letalis MasteryBeat the final boss with Letalis Fortis MasteryBeat the final boss with Fortis Plama Rifle MasteryBeat the final boss with the plasma rifle Quantum Disintegrator MasteryBeat the final boss with the quantum disintegrator Quad-Barrel Shotgun MasteryBeat the final boss with the quad-barrel shotgun Pulse Grenade Launcher MasteryBeat the final boss with the pulse grenade launcher Laser SMG MasteryBeat the final boss with the laser SMG Dual Blaster MasteryBeat the final boss with dual blasters Bolt Splitter Masterybeat the final boss with the bolt splitter Homing Staff MasteryBeat the final boss with the homing staff The First LockOpen the first lock The Second LockOpen the second lock The Third LockOpen the third lock Various Monster PartsProvide the prisoner with all of the required monster parts Antimatter BatteryRetrieve the antimatter battery A Good MealProvide the prisoner with a good meal A Bit of InspirationProvide the prisoner with some inspiration VictoryEscape the Coliseum PerfectionUnlock all achievements Add-on Unknown Pack 40 40 4 0.0000 (0%) MutantDestroy the Alien Mutant Hardcore Boss 1Defeat the Boss in Hardcore Arena 1 Hardcore Boss 2Defeat the Boss in Hardcore Arena 2 Hardcore PerfectionUnlock all achievements including Hardcore achievements