Besides having a really amazing single-player story, the co-op mode in Portal 2 is what keeps you going back. It can be all about killing your partner in the most treacherous ways, or finding the ...

Dom O'Leary is a contirbutor on Game Rant. He has over 6 years of experience in writing, covering everything from games news and reviews to commercial writing and editing. He's been a lover of games ...