Play Hidden Gems Games on Emulator Online. All the best Hidden Gems games online for different retro emulators including GBA, Game Boy, SNES, Nintendo and Sega. There are many online Hidden Gems 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. Hidden Gems games that started it all back in the day are now playable within your browser!