Jetpac: 2 Open Source Clones Compared
JetPac is a fully playable, standalone C#/XNA remake that ships its own assets, while the Ultimate Play the Game disassemblies project is a SkoolKit-based technical disassembly covering seven different 1983-84 Ultimate titles (including Jetpac), requiring players to already own the original games in order to disassemble their code. The disassembly is meant primarily as browsable documentation and a base for fan projects rather than a ready-to-play remake.
Comparison table

Availability
- Status
- Playable
- Platforms
- ZX Spectrum
- Play in browser
- YesPlay in Browser
- Mobile
- No
Project health
- Development status
- Halted
- Last updated
- 3y ago
- Stars
- 22
- Contributors
- 1
- License
- —
- Engine
- —
Compatibility
- Requires original assets
- YesYou will need to own the original game in order to disassemble the game code.

Availability
- Status
- Playable
- Platforms
- Windows
- Play in browser
- No
- Mobile
- No
Project health
- Development status
- Sporadic
- Last updated
- 5mo ago
- Stars
- 9
- Contributors
- 3
- License
- MIT
- Engine
- MonoGame
Compatibility
- Requires original assets
- NoFully playable remake written in C# and XNA, with no original asset requirement stated.
| Title | Ultimate Play the Game disassemblies | JetPac |
|---|---|---|
| Status | Playable | Playable |
| Platforms | ZX Spectrum | Windows |
| Play in browser | YesPlay in Browser | No |
| Mobile | No | No |
| Project health | ||
| Development status | Halted | Sporadic |
| Last updated | 3y ago | 5mo ago |
| Stars | 22 | 9 |
| Contributors | 1 | 3 |
| License | — | MIT |
| Engine | — | MonoGame |
| Compatibility | ||
| Requires original assets | YesYou will need to own the original game in order to disassemble the game code. | NoFully playable remake written in C# and XNA, with no original asset requirement stated. |
| Preview | ![]() | ![]() |
Frequently asked questions
Are the Jetpac 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 Jetpac clones use?
JetPac (MIT).
Do I need to own the original Jetpac to play these clones?
JetPac runs standalone, no original files needed; Ultimate Play the Game disassemblies requires original game assets to play.
Can I play any of these Jetpac clones directly in a browser?
Yes — Ultimate Play the Game disassemblies has a browser-playable build linked in the comparison table above, no install required.
See the full write-up for each clone, or go back to Jetpac.