Oh, sorry.
There's survival, which is also lame, but gets you coins and experience, then there's the option to "battle now" which is where the fun begins. This option is essentially multiplayer and has three modes,
Deathmatch: Get to a certain amount of kills first.
Cooperative: Work with other players in games like capture the flag etc.
Deadly Games: One kill and you're done, be the last to survive.
These all have a bunch of cool maps that are way better than campaign. I definitely suggest trying those before judging the game, but look out for creepy 12 year olds who are looking for "dates."
“In the course of twenty crowded years, one parts with many illusions. I did not wish to lose the early ones. Some memories are realities, and are better than anything that can ever happen again.” -Jim Burden (My Ántonia)