| Initial release | Unreal build 100 / May 1998 |
|---|---|
| Stable release | Unreal Tournament build 436
/ November 2000 |
| Written in | C++, UnrealScript, Assembly[1] |
| Platform | Microsoft Windows, Linux, Mac OS and OS X, Dreamcast, PlayStation 2 |
| License | Proprietary |
Unreal Engine 1 (UE1) is the first version of the Unreal Engine game engine. It was initially developed in 1995 by Epic Games founder Tim Sweeney for Unreal. Epic later began to license the Engine to other game studios. It was succeeded by Unreal Engine 2.