Play Retro Games Online is an Android application that offers a mobile version of the popular website RetroGames.onl. This app allows you to download and play retro games on your mobile device, with the downloaded games being saved in the browser's IndexedDB. The app also offers a Save/Load state feature, allowing you to save your progress and pick up where you left off at any time.

One of the most notable features of Play Retro Games Online is the ability to play with two players over the network, making it a great option for those who want to play with friends. The app also includes a touchscreen gamepad that appears on the screen, allowing you to easily control your game. However, if the game does not start immediately after the gamepad appears, you need to double-click on the game screen. It is important to note that some large CD games may not run on mobile phones, but most of the games are presented in a Rip version, which cuts out the music and video. Additionally, you can also play games on the RetroGames.onl website using your PC, and the app even supports USB gamepad usage.