The Re2LabBeta.zip file you have requested: Maps Levels Missions / Beta Maps / Resident Evil 2 Lab Beta - 28.08mb is not available. Perhaps try browsing all files for the game Left 4 Dead and upload any files you want to share or are missing. This is the only information we could locate:
This is a beta version of my project, the lab from Resident Evil 2.. There are puzzles, so keep a keen eye out. You will also need to have cheats activated to allow the game to create forced npc spawns.