Grave Gunner Achievements Here is the full list of all 5 Grave Gunner 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 Ghost SkewerSlay 2 Ghosts with your Guns simultaneously. Master GunslingerClear ALL waves. Tomb GliderSlide under a crawl space 3 times. Taking FlightUse your weapons to help you remain airborne for at least 2 seconds. FirepowerSlay a Skull King within 2 seconds of first damaging it.