Jack O Gunner Home Jack O Gunner 0.0 / 5 ( 0 votes ) Your Rating? Discover Jack O Gunner – Play Free Now on WebGameFree! Jack O Gunner - Welcome to the horror action shooter game. You need to kill all the skeletons, collect coins to upgrade your skills and survive as long as possible in this Halloween game. Play this game on mobile platforms and PC at RegionGame and destroy all the creepy skeletons. Categories in which Jack O Gunner is included: Arcade