New Super Mario Bros U makes the Wii U worth the buy alone. I think it's a fun, amazing game that anyone any age can appreciate.
game I played most when I was a kid was Super Mario 3 for the Nintendo.
This game more than lives up to the name. It seems like it takes all
the best things from every single Mario game and combines them into a
masterpiece. Countless times you will find yourself smiling remembering
something from your past. Finding secret areas, using all the
power-ups, fighting stuff on the map, dungeons, and bosses are just so
much fun. Time comes into play as well, it makes you try to move fast
and explore, all while trying to beat the clock. There are tons of
hidden areas and each level has 3 star coins. The Miiverse plays a role
here too where you can leave comments on levels to help each other out
or just say that you are happy you beat the level. For single player
the Wii U tablet remote doesn't serve as a real purpose other than
mirroring the screen, if you want you can play solely on that and let
someone else use the TV.
The multiplayer is crazy and exciting.
Some people would complain about other players on the screen because
they run into you and mess you up but I find it to be more fun. You
have to not only watch yourself but watch your teammates and work with
them to get past obstacles. It's worth noting that you need a Wii
remote for each character playing. For instance 1 Wii remote + 1 Wii
tablet = only 1 person on screen while the tablet player has a different
function. For 2 player you need 2 Wii remotes. This game can be
played by 5 people, 4 players on the screen using Wii remotes and 1
person using the Wii tablet. My friend and I have never had a dull
moment and have had to stop for a minute because we were laughing so
hard. Playing with friends adds to the complexity and makes you work
together to accomplish getting to secret areas.
Mario looks amazing in HD and this game is a must have for any Nintendo fan.
Feb 2013: Nintendo announced that there will be upcoming New Super
Luigi Bros. U DLC coming for this game. Which seems like it will redo
every map with a Luigi twist to it. Also I realized I didn't add that
the Wii U Pro controller will NOT work with this game either, so you are
stuck with Wii Remotes.
Update May 2013: Super Luigi U DLC
officially announced as a $20 download on June 20th. My friend and I
have finally beaten all the levels and gotten all the star coins. The
bonus star world has some extremely fun levels.
Update June 2013:
Super Luigi U is out as DLC to this game, you can also buy a physical
copy but it won't be released until Aug 25. This DLC is not a drastic
change from the original game. You get the same map with all the levels
reworked. They are shorter and you are supposed to complete them in a
faster amount of time. To me it seems a little easier. The physics
(jumping and running) are different too. I personally don't like it as
much. Also when playing with 4 player, whoever uses Nabbit gets bored
since he can't die and it's cheating on all the boss fights. I wouldn't
say this is a must have, but if you like Luigi and have the spare money
you might as well.
Update July 2013: Thanks to Kyle B. in the
comments, I've also been informed with the Luigi U update the game can
now use the Pro controller which is a nice addition. My friend and I
have played some more of the Luigi U DLC and it's just not as fun. We
don't find ourselves laughing nearly as much and it seems we are always
out of time, even though I know that's the point of the shorter times.
If you play as Nabbit it is still horribly boring