Old signs :
Hazard: The Journey of Life was the original name for Antichamber when it was in the alpha testing stages. Hazard was an Unreal Tournament 3 (UT3) mod. The gun model was completely different, as pictured in one of the Dev Rooms of Antichamber; this gun was a washed out version of the Link Gun from UT3. Many of the puzzles changed between Hazard and Antichamber, although most of these changes included additions and simplifications. Overall, the map was mostly the same with a few less rooms as well as different puzzles because of the limitations of a UT3 mod. This version of the game is no longer obtainable except for one or two obscure mirrors. Originally, the mod was available from Alexander Bruce's website, http://demruth.com, which now redirects to http://antichamber-game.com.
Luckily, the 2010 demo and the final UT3 mod release were saved to archive.org. However the 2nd September 2009 UT3 Mod was not so I had to find it after some digging on the internet.
This mod require Unreal Tournament 3 installed, instruction on how to install are in READ THIS.txt
hazard.rar - 11.3 MB
This mod require Unreal Tournament 3 installed
Hazard - The Journey Of Life Installer.exe - 21.2 MB