Gremlins Unleashed review. Classic Game Room presents a CGR Undertow review of Gremlins Unleashed for the Game Boy Color developed by Planet Interactive and published by LSP. One important rule. Don't get water on Gremlins Unleashed. Actually, that's a rule for most game cartridges, but you really wouldn't want to do that to this one. A straightforward 2D platformer, Gremlins Unleashed is as simple as gaming gets—jump on things, collect other things. Playing as either Gizmo or Stripe, you move through open 2D levels as you search for key items. Gremlins Unleashed isn't a spectacular game, but it's a solid run-of-the-mill platformer. This video review features video gameplay footage of Gremlins Unleashed for the Game Boy Color and audio commentary from Classic Game Room's Derek.