Earth Defense (Chinese: 地球防衛戰; pinyin: Dìqiú Fángwèi Zhàn), showm as The Earth Defend on the title screen, is a vertically scrolling shooter for the Mega Drive/Genesis. The game is unlicensed; it was developed by AV Artisan and published by Realtec in both North America and Taiwan without a license from Sega.
The cartridge and box shapes as well as quality in graphics and box art are identical to AV Artisan's previous games Funny World & Balloon Boy and Mallet Legend's Whac-a-Critter, both published by Realtec. The player takes on the role of a jet pilot assigned to liberate five world continents from a technologically advanced army. Earth Defense allows two-player simultaneous multiplayer.