Developed by Toaplan and released in North America by Romstar and Toaplan/Tecmo globally, Out Zone combines the vertically scrolling run-and-gun mechanics of games like Ikari Warriors with many of the conventions of shoot-em-ups like Truxton: weapon power-ups add more powerful shots and 3-way shooting, and you face waves of similar enemies in formations as well as a variety of mini-bosses and stage bosses. However, the conventions of run-and-gun games such as directional aiming and ground-based obstacles make Out Zone a very different experience, with a faster pace and more intense encounters than most of its run-and-gun contemporaries.