Play Defender Games on Emulator Online. All the best Defender games online for different retro emulators including GBA, Game Boy, SNES, Nintendo and Sega. There are many online Defender games in the collection. All of the games that you see here are without download, pick any and start playing right away. If you enjoy the game, be sure to vote for it and leave a comment. Defender games that started it all back in the day are now playable within your browser! Start by playing some popular Defender online games like Bakugan: Defenders of the Core, Defender, Centurion: Defender of Rome and Defender II.