Mods are user created, so you can never be sure how good they will be, but ATLAS and P-body are brilliantly rendered here, and their movement is as good as their looks. If you've played Portal 2, you'll recognize the two bots, but they are much more violent in Liberty city than in the Aperture Science test chambers. Unfortunately, sound effects haven't been added, so your bot will still make some human noises.
Instructions for installing the GTA IV - Portal 2 Co-Op Bots Mod are included in the download. As cool as playing as ATLAS and P-body is, this mod makes you wish for even more. What about Portal guns in GTA IV?
If you want to freshen up your GTA IV carnage, the GTA IV - Portal 2 Co-Op Bots Mod is pretty cool.