You will have to defeat 2 of the challenges to progress through the game anyway. Once this mission is complete, go back to the human carnival and try tackling the other 4 games you didn't do in order to get the achievement.
While 5 of the 6 are pretty easy to accomplish, Kickman has been giving people some trouble. Your best bet would be to aim for the small green ring near the bottom of the floor. This is a 10x multiplier and, with some luck, you might be able to hit the 1000 point target with this to beat this challenge.