OSES Achievements Here is the full list of all 12 OSES 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 What are achievement flags? Click to find outApply Sniper efficiencyKill 3 zombies with one shot using the sniper rifle Fast triggerKill 3 zombies in 3 seconds using the pistol Close CallKill a zombie from a really short distance using the shotgun. Burning laserApply damage to 5 zombies without releasing the trigger using the laser gun. Challenge acceptedComplete all the official map challenges. Safe distanceKill a zombie from a long distance using the assault rifle. Money pileAccumulate 20,000 credits in the game. Out of stockBuy all of the items from the in-game shop. Shooting crazeShoot 1,000 times on a single match. PacifistComplete a classic map without killing a single zombie. Zombie extintionKill 1,000 zombies CreatorUpload a map to the workshop.