The patch is available for the following versions:
They can be downloaded from the Files section.
Included with Unreal II: The Awakening Special Edition, it is an official expansion to the game adding multiplayer functionality (with 8 maps). The expansion is available for free for regular copies of the game. Note that the PLAY disk for Unreal II: The Awakening is required to install the expansion.
Solaris Base Bonus Map is an additional map created by Matthias Worch.
Unreal Editor is the official modding program for the Unreal 2 engine. It is used to create professional levels and full scale conversions for the game.
Version 3 of the editor comes bundled with all versions of Unreal 2.
It can be found in the Systems folder in the installation folder.