MLP-Portal on DeviantArthttp://creativecommons.org/licenses/by-nd/3.0/https://www.deviantart.com/mlp-portal/art/kaylathedragoness-Present-294447844MLP-Portal
1. open the zipfile 2. Open the folder "kaylathedragoness" and extract to c:\Program Files\Steam\steamapps\kaylathedragoness\portal\portal 3. say "yes to all" to any ovewrite messages 4. Play portal.