Or if you are brave or have awesome skills then you can design your own. (lifewithmylittles.com)
What if I tell you that there is a whole gamut of activities out there that are even more fun, develop awesome skill, and oftentimes are considered a sport. (roughstrength.com)
It's not as tactical as the other four, but it has many awesome skills you can unlock. (xboxenthusiast.com)