This is a Portal 2 modification called "Relocation". This miracle is created by a small team with no money but with enthusiasm. The main idea is the implementation...
portal:relocation abstract
No mods were found matching the criteria specified. We suggest you try the mod list with no filter applied, to browse all available. Add mod and help us achieve our mission of showcasing the best content from all developers. Join now to share your own content, we welcome creators and consumers alike and look forward to your comments.