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.
Now shipping: HamsterOS Beta 3 · Free download
Founded 1985
Games · Systems · Tools
Classic + modern hardware
Still independent
Studio log
Latest news
Selected work
Selected games
Mean Hamster Power Engine for Atari 8-Bit
Coming soonComing soon: Doom, Atari 7800 emulation, and an optional HamsterOS desktop with mouse support, powered by new firmware for A8Pico.
Mean Hamster Power Engine for C64
2026One Windows application for TeensyROM+ and Kung Fu Flash 2. Prepare your SD card, choose optional HamsterOS, and build your supported games and emulators.
ZipZork
2026The free Z-machine interpreter for HamsterOS, ready now with Zork I and support for .z1 through .z6 story files.
AGI-64
2026Sixteen supported adventures for the Commodore 64 and seven for Atari XL/XE and upgraded Atari 800 computers. Download the free Windows compiler and bring your own game files.
Castles & Kings 5200
Coming soonComing soon: Mean Hamster is bringing the rediscovered Castles & Kings prototype to the Atari 5200.
KLIX 5200
ArchiveThe Atari 5200 tile-stacking game returns in a refined 2026 cartridge edition with improved movement and smoother gameplay.
Current work
Built for the machines you use
HamsterOS
A free, friendly operating system for 386 and 486 PCs—complete with a desktop, applications, games, and real floppy-disk distribution.
Explore HamsterOS →02HamNet
A free browser that gives supported classic computers a useful way onto the web, with optional modern-page rendering through HamNet+.
Explore HamNet →03HamsterWeazle
A clear desktop interface for GreaseWeazle floppy imaging on Windows and Mac.
Explore HamsterWeazle →