One of that annoying games that you have to finish even if you don't want, because it's a part of the quest :/ There should be option to skip at least one game to finish the quest and it would be definitely this game.
OMG, Here's walkthrough for the 4th race:
1. Grab all the stuff from the road.
2. Stab your opponents every time you can.
3. Sprint as often as you can.
4. Donate, when the officials are watching.
 "Temple of the Four Serpents"){kind=icon}
 "Cardinal Chains"){kind=icon}
 "Dark Cut"){kind=icon}
 "StrikeForce Kitty"){kind=icon}
 "Racing Comrade!"){kind=icon}
 "Socrates Jones: Pro Philosopher"){kind=icon}
 "Curl Up and Fly!"){kind=icon}
 "Hippolyta"){kind=icon}
 "The Fancy Pants Adventures"){kind=icon}