AGI-64

A long-awaited AGI interpreter for the Commodore 64. King's Quest I and Space Quest I are nearly 100% complete, with King's Quest IV now in compatibility testing. Free download when it is ready.

Get notified at launch

Space Quest 1: The Sarien Encounter title screen rendered by AGI-64 on a Commodore 64

Sierra adventures on a 1 MHz machine

AGI-64 is a long-awaited AGI interpreter for the Commodore 64. King's Quest I and Space Quest I are nearly 100% complete, and King's Quest IV is now in compatibility testing.

The interpreter is going through complete playthrough testing and already supports most standard AGI operations.

The Arcada bridge in Space Quest 1 running on AGI-64 for the Commodore 64

AGI-64 showing a Space Quest 1 message window on the Commodore 64

Bring your own game files

AGI-64 will be offered as a free download when it is ready. It consists of a tool that takes the .vol and .obj files you provide from your own library and compiles them into a 1 MB EasyFlash-compatible CRT file.

Those CRT files run easily on third-party products such as Kung Fu Flash.

Save and load on real hardware

Save and load are both supported using real or SD card 1541-compatible drives on drive 8, with a custom disk format. Up to six games can be saved and loaded.

AGI-64 running on real Commodore 64 hardware

AGI-64 on a real Commodore 64 with a CRT display

Development update · August 27, 2026

King's Quest IV in testing

King's Quest IV was developed as both the final King's Quest built in AGI and Sierra's first SCI game. Completing compatibility with its AGI edition should round out the remaining features needed by the AGI interpreter for the Commodore 64.

King's Quest IV running in AGI-64 during Commodore 64 compatibility testing — King's Quest IV running in AGI-64 during compatibility testing.

We have been hard at work playtesting games and making sure they can be won from start to finish. King's Quest I and Space Quest I are both nearly 100% complete.

2 MiB Magic Desk testing

We have also tested the 2 MiB Magic Desk 16K cartridge format with larger games such as King's Quest IV, and the results have been good. Its bank configuration makes it slightly slower than a 1 MiB EasyFlash cartridge, but it currently appears to be the most accessible format for games that need the additional space.

A 2 MiB Magic Desk cartridge image can be run from a TeensyROM cartridge. Thanks to Travis from Sensorium for the heads-up!

Compiler tool work in progress

Work-in-progress Sierra Game Compiler interface recognizing an AGI game and preparing an EasyFlash CRT build — The Sierra Game Compiler tool while development is still in progress.

The compiler scans a game's AGI data, recognizes known editions, reports compatibility, and prepares an EasyFlash-compatible CRT for the C64.

Read the full development update.

Built to look its best and load fast

AGI-64 includes a custom background pre-processing technology that keeps the original artwork looking its best, loading fast, and working well on our 1 MHz best friend.

In the news

Watch this page for development updates and the free download when testing is complete.

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