SunDog: Frozen Legacy: 2 Open Source Clones Compared
This SDL2-based port keeps gameplay and graphics close to the original 1985 Atari ST release, implementing its own p-system interpreter to run the game's UCSD Pascal p-code rather than emulating the Atari ST hardware directly, and requires the player to supply their own disk image of the original. Per its own description, a full re-imagining of SunDog is instead being pursued separately by the unrelated SunDog Resurrection project listed alongside it here, though no further descriptive data is available for that entry.
Comparison table

Availability
- Status
- Playable
- Platforms
- OSX, Linux
- Play in browser
- No
- Mobile
- No
Project health
- Development status
- Sporadic
- Last updated
- 10mo ago
- Stars
- 97
- Contributors
- 4
- License
- MIT
- Engine
- SDL2
Compatibility
- Requires original assets
- YesRequires a 360K .st raw disk image of the original Atari ST game; can be imaged from an original copy or found on abandonware sites.

Availability
- Status
- Playable
- Platforms
- None
- Play in browser
- No
- Mobile
- No
Project health
- Development status
- Not tracked
- Last updated
- Not tracked
- Stars
- Not tracked
- Contributors
- Not tracked
- License
- Not tracked
- Engine
- Not tracked
Compatibility
- Requires original assets
- —
| Title | Sundog: Frozen Legacy | SunDog Resurrection |
|---|---|---|
| Status | Playable | Playable |
| Platforms | OSX, Linux | None |
| Play in browser | No | No |
| Mobile | No | No |
| Project health | ||
| Development status | Sporadic | Not tracked |
| Last updated | 10mo ago | Not tracked |
| Stars | 97 | Not tracked |
| Contributors | 4 | Not tracked |
| License | MIT | Not tracked |
| Engine | SDL2 | Not tracked |
| Compatibility | ||
| Requires original assets | YesRequires a 360K .st raw disk image of the original Atari ST game; can be imaged from an original copy or found on abandonware sites. | — |
| Preview | ![]() | ![]() |
Frequently asked questions
Are the SunDog: Frozen Legacy clones on this page open source?
Yes — every clone catalogued here is an open-source project. Availability, license, and development-status details for each one are listed in the comparison table above.
What license do these SunDog: Frozen Legacy clones use?
Sundog: Frozen Legacy (MIT).
Do I need to own the original SunDog: Frozen Legacy to play these clones?
Sundog: Frozen Legacy requires original game assets to play.
See the full write-up for each clone, or go back to SunDog: Frozen Legacy.