Classic games you are actually allowed to play.
RetroPlay is a small library of retro games that are free by license: open-source homebrew, shareware episodes and official freeware releases — playable in your browser, nothing to install. Plus a player for game files you already own: they never leave your device.
Platforms
Nintendo Entertainment System
fceumm-line homebrew and freeware for the 8-bit console that restarted home gaming.
Game Boy / Game Boy Color
Open-source and MIT-licensed handheld games — platformers, roguelikes and even a city builder, all running on the 1989 hardware spec.
Game Boy Advance
Modern open-source releases that push the 32-bit handheld: a full falling-block suite and a real-time strategy game about floating islands.
Sega Master System
Sega's 8-bit console, kept alive by the SMS Power homebrew scene.
Atari 2600 (VCS)
The 1977 original. New games are still written for it — including one in C, released as open source.
MS-DOS (PC)
Shareware episodes and freeware releases from the PC era — the games whose licenses were written to be copied and shared.
The library
uCity
Handheld urban planning and city management on Game Boy Color.
▶ Play in browserAstro Force
Battle waves of hostile fleets across deep space sectors.
▶ Play in browserPaul's HappyBird
Guide a flying bird through tight gaps without crashing.
▶ Play in browserCommander Keen: Marooned on Mars
Explore Martian outposts to retrieve your stolen spaceship parts.
▶ Play in browserA Slime Travel
Help a slime adventure through levels in this platformer.
▶ Play in browserCrossConnect
Link matching endpoints on a grid without crossing paths.
▶ Play in browserDeep Scan for GBC
Drop depth charges on submarines below the surface.
▶ Play in browserGB-Wordyl
Guess the five-letter word in six tries with color hints.
▶ Play in browserTobu Tobu Girl Deluxe
Expanded platformer about bouncing to rescue your cat.
▶ Play in browserGRIMLIGHT: The Hollow Bell
Turn-based gothic puzzle adventure set in a dark bell tower.
▶ Play in browserMeteoRain (GBA Jam 2021)
Arcade game about dealing with falling meteors on GBA.
▶ Play in browserMinicraft for GBA
Handheld port of the top-down crafting survival game.
▶ Play in browserThe Hat Chooses the Wizard
Compact adventure about a wizard and his hat.
▶ Play in browserThe purple night
Short atmospheric adventure set during a strange purple night.
▶ Play in browseruCity Advance
City-building simulation with bigger maps than the original.
▶ Play in browser