Independent software studio · Since 1985

Games and tools for computers worth remembering.

Mean Hamster has shipped original games, Thoughtful ports, and useful software for four decades—from Atari and Pocket PC to HamsterOS and HamNet today.

Explore the game catalog Read our 40-year story

Now shipping: HamsterOS Beta 3 · Free download

Founded 1985

Games · Systems · Tools

Classic + modern hardware

Still independent

Studio log

Latest news

All posts →

Aug 15, 2026

AGI-64 Brings Sierra Adventures to the Commodore 64

A long-awaited AGI interpreter for the Commodore 64 is in production. Space Quest 1 is completely playable at roughly 75% complete, and AGI-64 will be a free download when it is ready.

Read the dispatch →

Aug 4, 2026

Coming Soon: Castles & Kings for Atari 5200

Aug 3, 2026

HamsterOS CGA Is Now Available

Selected work

Selected games

View the full catalog →

AGI-64

Coming soon

A long-awaited AGI interpreter for the Commodore 64. Space Quest 1 is completely playable now at roughly 75% complete, with the engine aiming to support most AGI games of the era. Free download when it is ready.

Castles & Kings 5200

Coming soon

Coming soon: Mean Hamster is bringing the rediscovered Castles & Kings prototype to the Atari 5200.

KLIX 5200

Archive

The Atari 5200 tile-stacking game returns in a refined 2026 cartridge edition with improved movement and smoother gameplay.

Scary Mansion 3D+ 5200

Archive

The updated Atari 5200 adventure: explore 90 rooms across two mazes with new creatures, new treasure, bug fixes, a new title screen, and updated instructions.