The Battledome is considered a game in Neopets, but I did not include it in the top five, as it is basically its own entity. The Battledome has many more aspects to it such as gathering equipment for defense and offense, leveling your pet at the Training School, learning spells from faeries, and unlocking new opponents around the site. A few other chance games worth mentioning include The Wheel of Mediocrity, The Wheel of Excitement, The Wheel of Misfortune, plus three different scratch cards you can buy!
Faerie Cloud Racers is an endurance race, where as you move, you leave a cloud of smoke behind you. You can not touch that cloud of smoke, so you have to keep moving until either you or your opponent runs into something first!
There is also Cheat!, a card game where you try to bluff your way to the finish. When you lay cards you have to tell the opponents which cards you are laying. If they call your bluff, and you actually are bluffing, you pick up the whole pile! The first person to use all their cards wins. You can also win trophies in Cheat!