Enter the Gungeon. So choose your free item wisely. If you steal twice the shopkeeper will not sale anything for the rest of the run. Smoke bombs, the Box, Charm Horn, Ring of Etherealness (forgot the actual name), Grappling Hook are the ones I know of. Apr 13, 2016 @ 1:05pm. You also gain a bit of curse so be mindful of that. Enter the Gungeon is a gunfight dungeon crawler following a band of misfits seeking to shoot, loot, dodge roll and table-flip their way to personal absolution by reaching the legendary Gungeon’s ultimate treasure: the gun that can kill the past. It's possible to not get caught if you activate cloaking item outside the shop, quickly enter, steal item and leave the shop before it wears off. Apparently with a grappling hook you can, but the shopkeeper will react to it the same as with shooting in the shop.