When you picked what kind of game you want to play -Completionist or Speed Runner or whatever- there is an option for Single Player at the bottom of the list. --- --- That which doesn't kill me, probably didn't try very hard.
It's an option. Just look through the options and change your game to single player. No problem.
This - As seen at 8:50 of the video, there are four options, 1 completishly, 1 Speedrun, 1 Hardcore and 1 Single Player.
http://www.youtube.com/watch?v=VkE26z-Sj2E&list=SPSnNGY_QR2gQqUC0bE-M4-Nxdlq2j4_lN --- American Sign Language is my primary language - deal with it! "ESL" is standing for "English Sign Language", period.