L4D2onL4D Addon 1.0 can be downloaded from our website for free. The program lies within Games, more precisely Utilities. This free software was originally designed by L4D2onL4D Team. This download was scanned by our antivirus and was rated as safe. The following version: 1.0 is the most frequently downloaded one by the program users.
From the developer:
The goals of this project are to serve as a proof of concept, proving that Valve could have easily made the new maps in the original game, and to strenghten the L4D playerbase with new content, while taking this content from the sequel, ironically to Valve's similar actions against Left 4 Dead.
You may want to check out more software, such as FSX – Kingfisher Addons MegaPack, Addon Converter X or AddOn Studio for World of Warcraft, which might be similar to L4D2onL4D Addon.