I hope Nokia and HMD will bring back old-school Nokia games for Nokia 3310 3G like City/Tower Bloxx, Bounce, and others since it can play java games already. Instead of preinstalling it with trial-only games.
However, if you want a game, you can write on google "game_name.jar" for ex. "Bounce.jar" and download it on your nokia 3310. When the download is complete, you have only to select it, and start the installation.