Something I've been working on for the past couple of days, I went into the escape_02.vmf and replaced most all of Portal 1 assets with Portal 2 ones (Including GLaDOS, with the Portal 2 animations). There are still many bugs with this, as you can see in the video (for example, the collision model is a complete mess), but for the most part, it works. If people want, I will include a download link here, but for now, I'm just going to upload this as I will likely continue to update it. Who knows, maybe I'll make it into a full blown mod. Also, this is Portal 1 and not Portal 2 because I don't like mapping for Portal 2 :-)