1080 is an option if your pc supports it. It only displays the options available to you.
I am enjoying the game, me and my friends have played about 6 or 7 hours just being assholes to each other...just like old times!
I am a 1440p user. I searched steam forums and saw others having the issue.
It has been patched 1440p is working. Pretty fun. Must play with a controller.
Game will probably be a big hit come X-mas sale.