National Geographic Challenge! provides quite a number of ways for you to play. There are three different games for you to play: Quiz Mode, Explorer, and Puzzle Battle, and three different Puzzle Modes available: Jigsaws, Squares, and Sliders. The first place that I started was Quiz Mode as it is the one of the three games that can be played single player. The first thing you do is choose a region of the world to play in. The regions for all the games are: North America, Europe, Asia, South America, Africa, Australia-Asia, and Mega Quiz (which covers all regions). After you choose a region, you select from either 40, 60, or 80 questions, then choose Easy or Hard, and finally the number of players from 1 to 4. The questions are divided into different rounds. In some rounds, there is no break between questions so be prepared! The quicker you answer, the more bonus points you will get on some rounds. Others you will have to bet the points you already have. If you answer correctly, you will get that many back but if you lose, you will lose those points. You can't really fail the game, but the better a score you get, the better a rank you will earn.
Explorer is for 2 to 4 players and they can play with each having a controller or all share a controller. The tokens that you select here will give you different abilities. Two players cannot choose the same token. Once the game starts, you will choose a starting territory. On your turn, you move spaces and answer questions to gain new territory. It takes 2 out of 3 correct to win the territory, so you best know your trivia! You can also steal another player's territories making this a bit like Risk with trivia added. There are also things like Wildcard territories which just pop up randomly and do things like warp you across the board or even swap your territory with another player's. They really add a level of mystery to the game.
The final game is Puzzle Battle. It is for 2 players. You are both competing for the same puzzle pieces to see who can get the most solved. If you get tired of trivia, there are plenty of Puzzles, Jigsaws, Squares, and Sliders for you to play. Select the type of puzzle you want, then select a region and then a puzzle. You'll have to complete some to unlock the rest. The puzzle pictures are really beautiful once you get them completed.