Get your hands on 852 games, including many rare titles that aren't available anywhere else in a single collection. All games are in English, and the menus are in alphabetical order with no duplicates. You can easily switch between menus for the 405 list and the 447 list by pressing the SELECT button. This cartridge is compatible with a range of systems, including original NES, Retron systems HD, 1, 2, & 3, Retro Bit systems, and other hardware clone systems like Gamerz Tek. Please note that it will not work on Retron 5 and Retro Freak, as they are Android emulators, not hardware. The game select menu is in alphabetical order, and all games are fully in English. The lists are switchable between the 405 and 447 games. PAL and NTSC compatible, the cartridge comes with instructions for switching regions. PAL games only play on European systems, whereas all other games are NTSC and will play on systems in the US, Canada, and other regions. Games that say ""Support Original NES Console Only"" may also work on good quality clones such as the Retron 3. However, yellow highlighted games are not guaranteed to work on any other system models. All cartridges are tested at least 3 times in different systems prior to shipment. Games that originally had an in-game save feature will support a save file on this cartridge. However, only one game's save is supported on the cart at a time, and there are no ""save states."" Games that save work exactly as they did originally. If you want to keep the current game save, you need to play the same game. Saving a different game will overwrite the previous game save. If you have a current save you want to keep, avoid playing any other game that requires a save file.All games are in English. Includes a Duo game Selection menu with FOREVER 1 (405 IN 1) and (FOREVER 2 (477 IN 1) options.