SimCity city data
File type: Game file
A cty file contains saved city data for SimCity, the city-building and simulation game.
This format is associated with the MS-DOS version of SimCity and stores a city for later loading in the game.
Found 3 different file type records with the same cty filename suffix.
File type category:
Game file
Date updated: October 6, 2026
Record marked as obsolete and not updated for a long time.
SimCity was developed by Maxis as a city-building and economic simulation game for MS-DOS and other platforms. The cty file is the game's city data format.
A cty file stores the state of a SimCity city, including its map and the development and simulation data needed to continue playing it.
The format is obsolete and was intended for use by the original game rather than as a general-purpose data format.
Open a cty file with the MS-DOS version of SimCity and load it from within the game.
On a modern computer, run the MS-DOS game in a DOS emulator such as DOSBox, then load the file from within SimCity.
The SimCity cty format is a game-specific city data format and is not intended for conversion to a common document or image format.
To preserve or move the city, keep the original cty file and load it in the compatible MS-DOS version of SimCity.
Software applications that handle other tasks involving cty files:
Microsoft MS-DOS
File type category:
Document file
Date updated: October 3, 2026
Record marked as obsolete and not updated for a long time.
CityDesk was content management software developed by Fog Creek Software. It used .cty files to store templates that controlled the presentation of site content.
CityDesk was designed for Windows and is now obsolete.
Open the file with the original CityDesk software on Windows. Since CityDesk is obsolete, it may require an older or compatible Windows environment to run.
CityDesk .cty files are not generally converted directly. If the original CityDesk installation is available, use it to inspect or reuse the template.
For migration to another content management system, the template generally needs to be recreated in the target system rather than converted directly.
File type category:
Game file
Date updated: September 24, 2026
Railroad Tycoon 3 was developed by PopTop Software. The game uses CTY files as part of its internal game data, storing information related to the cargo that can be transported during play.
This is a proprietary game file rather than a document intended for direct use. It belongs to the Windows version of Railroad Tycoon 3 and is not a general-purpose cargo-data exchange format.
Railroad Tycoon 3 opens and uses CTY files automatically when it needs them. Place the file in the location expected by the game, if necessary, and start the game normally.
A text editor or general-purpose file viewer is not expected to display this file in a useful form, and manually editing it may prevent the game from loading its cargo data correctly.
There is no standard conversion for a Railroad Tycoon 3 CTY file. It is an internal game-data file, so it normally remains in the original format and is used only by the game.
Software applications that handle other tasks involving cty files:
Microsoft Windows
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