It's surprising that only one other developer had thought about remaking Crossfire, but between the two Gridfire
emerges champion and leaving no room for dispute. Basically your objective is to navigate around a maze and shoot everything that moves to advance through each stage.
Enemies will attempt to hide behind other objects, only emerging to ambush you at the right time. Your ammunition supply is limited but can be replenished by collecting the correct bonus item. Updated sprites make for cute targets as well.
Deserves full marks if not for the missing joypad support.