The Garrett Game is a mod for shareware Wolfenstein, made by DasFoozGamez. It was released sometime in 2001 with the latest version coming out on May 31.
The mod was never uploaded on the Wolfenstein 3D Dome and was relatively obscure.
The simple storyline is as follows:
You are Garrett. Someone has been plaguing your dreams and now you must find him/her and give him/her the ass-kicking of a lifetime!
The mod can be played in SDL as no source code changes were featured, and the fact that v1.4 was used.