Transport Tycoon: 3 Open Source Clones Compared
OpenTTD's own README states it 'attempts to mimic the original game as closely as possible while extending it with new features,' and it can run on either the original Transport Tycoon Deluxe data or the free OpenGFX/OpenSFX/OpenMSX graphics, sound, and music it ships with. Simutrans instead describes itself as a general freeware transportation simulator rather than a TTD-specific recreation, using its own 'paksets' for graphics. TTDPatch, a halted DOS/Windows-era project, has no further documentation available.
Comparison table

Availability
- Status
- Playable
- Platforms
- Windows, Linux, OSX
- Play in browser
- No
- Mobile
- No
Project health
- Development status
- Active
- Last updated
- today
- Stars
- 8,264
- Contributors
- 268
- License
- —
- Engine
- SDL2
Compatibility
- Requires original assets
- NoIncludes free OpenGFX, OpenSFX, and OpenMSX graphics/sound/music, or can optionally use original Transport Tycoon Deluxe data.
- Modding support
- YesExtensive add-on content system including mods, scenarios, and custom vehicle sets downloadable via in-game content service.
- Multiplayer
- Online, LAN, Co-op

Availability
- Status
- Playable
- Platforms
- Windows, Linux, OSX, BeOS
- Play in browser
- No
- Mobile
- No
Project health
- Development status
- Active
- Last updated
- 3d ago
- Stars
- 100
- Contributors
- 16
- License
- —
- Engine
- SDL2
Compatibility
- Requires original assets
- NoGame includes its own free graphics packages (paksets) and does not require original game assets.
- Modding support
- YesSupports custom paksets and addons for graphics and gameplay expansion.
- Multiplayer
- Online, LAN

Availability
- Status
- —
- Platforms
- DOS, Windows
- Play in browser
- No
- Mobile
- No
Project health
- Development status
- Halted
- Last updated
- 8y ago
- Stars
- 11
- Contributors
- 12
- License
- GPL-2.0
- Engine
- —
Compatibility
- Requires original assets
- —
- Modding support
- —
- Multiplayer
- —
| Title | OpenTTD | Simutrans | TTDPatch |
|---|---|---|---|
| Status | Playable | Playable | — |
| Platforms | Windows, Linux, OSX | Windows, Linux, OSX, BeOS | DOS, Windows |
| Play in browser | No | No | No |
| Mobile | No | No | No |
| Project health | |||
| Development status | Active | Active | Halted |
| Last updated | today | 3d ago | 8y ago |
| Stars | 8,264 | 100 | 11 |
| Contributors | 268 | 16 | 12 |
| License | — | — | GPL-2.0 |
| Engine | SDL2 | SDL2 | — |
| Compatibility | |||
| Requires original assets | NoIncludes free OpenGFX, OpenSFX, and OpenMSX graphics/sound/music, or can optionally use original Transport Tycoon Deluxe data. | NoGame includes its own free graphics packages (paksets) and does not require original game assets. | — |
| Modding support | YesExtensive add-on content system including mods, scenarios, and custom vehicle sets downloadable via in-game content service. | YesSupports custom paksets and addons for graphics and gameplay expansion. | — |
| Multiplayer | Online, LAN, Co-op | Online, LAN | — |
| Preview | ![]() | ![]() | ![]() |
Frequently asked questions
Are the Transport Tycoon 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 Transport Tycoon clones use?
TTDPatch (GPL-2.0).
Do I need to own the original Transport Tycoon to play these clones?
OpenTTD and Simutrans run standalone, no original files needed.
Which Transport Tycoon clone is the most actively maintained?
OpenTTD and Simutrans are currently under active development, based on recent commit activity. See the "Development status" row above for every clone's current status.
See the full write-up for each clone, or go back to Transport Tycoon.