NBA 2K12

An easy way to do this is to use LeBron James on the Miami heat and dunk on your opponent. Use a second controller to put a guy underneath the hoop. Then run up to the basket and press x (as your running) to dunk the ball. If this doesn't work, you can always do any alley-oop (press LT and B) with the second controller underneath the hoop. Just watch out for the three second defensive violation for your second controller. They should show a sprite slam cam and your achievement should pop up. Good Luck!

Edit: The quarter lengths need to be set to five minutes to obtain this achievement. Thanks to asbarnes.

First off i just wanted to clarify that your dunk has to trigger the SPRITE SLAM CAM REPLAY!! A lot of people are saying this achievement is glitchy and not unlocking. There are two different types of replays i have seen so far. If your dunk is good but not spectacular enough it will trigger a normal replay and a 2K Sports logo will flash across the screen. This will NOT unlock the achievement! The dunk has to be spectacular and unlock the SPRITE SLAM CAM which you can't miss because the crowd will go berserk and a big Sprite logo flashes across screen. After the replay finishes the achievement will pop. I used two controllers and obviously used the Heat for my main profile. Alley oops weren't working so i just kept giving the ball to Lebron at the top of the key. Then with the 2nd controller switch to the guy covering him by tapping RB and then the button that represents his position. Then with Lebron you can just dribble around that guy and get a huge head of steam going to the basket. Make sure you are holding down RT for turbo speed. Then i found that using the RS for shot stick would cause Lebron to just throw up layups so use the X button for your dunks. With that huge head of steam going to the basket and hitting X you should dunk every time and usually another player will step in front of you when they see you get by your man leaving him open for a poster dunk that eventually will trigger the right replay. So remember, use RT for speed and X to dunk and make sure you get the SPRITE replay instead of the regular one.

Quite simple but a couple things to remember..

I tried this in Create A Legend mode and it DID NOT work. I ended up playing quick game and it did.

Remember it has to be the sprite slam cam not just the regular replay.

Other than that simple. Oh and yeah, gotta use LeBron ;) sorry all haters!

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Going to add a little bit more information...

This achievement is pretty simple and you should just be able to get it by playing normal. However, you can change some settings to help you out.

Put your Steal Slider to 100 (this can be done by going to start menu, options, gameplay, sliders, defense), and use LeBron to steal the ball then go for a fast break break away 1 v. 0 dunk. If there's no sprite replay, just try again until there is!

Good luck!

I just got this. I had it set on rookie all sliders up on mia. all down on charlote. changed lebron and wades position. put it on coach mode. walla. try this. It does work on coach mode.