.SC3 File Extension
What is an SC3 file?
Game file used by SimCity 3000, a city building simulation game that is the sequel to SimCity 2000; saves the starting conditions for the city, including the terrain, buildings, water, roads, and other map features; may be a map included with the game or a custom map created by the player.
SimCity 3000 was released in 1999 for older versions of Windows (e.g., Windows 98). To play the game in recent versions of Windows, you can use emulation software such as Oracle VirtualBox. First install the older Windows version and then install SimCity 3000.