Motocross Madness
36 Achievements
500
10-13h
Combo King
Performed an X, Y and B combo within one event
20
How to unlock the Combo King achievement in Motocross Madness - Definitive Guide
K4rn4ge
TrueAchievements
TrueAchievements
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Once you are at this spot, you will want to boost (hold A) and accelerate (hold RT) and jump off the darkened ridge ramp ahead of you. Once in the air, you will want to hold the X button and while doing so press UP, DOWN, UP. Alternatively you could also press UP X, DOWN X, UP X. The timing is important - don't do it too quick but also not too slow - basically wait until you see your rider start the trick and then switch to the next button input. I found it easier to just hold X and press UP, DOWN, UP though (all the while holding X). Be sure to let go of X before you land though otherwise you will crash. If you do the previous button inputs correctly, you will see a green COMBO word pop up at the top of your screen and your bike will have a bluish electrified effect on it. However, you NEED to land it for it to count towards the achievement. As you land, hold up on the left stick as you have a better chance of landing it smoothly. If you do crash, simply press the BACK button and it should respawn you on the mountain. If it doesn't for some reason, drive back the spot manually. Anyway, that is the "X" combo but there are still two more to cover before you unlock the achievement...
Once you landed the "X" combo, press BACK to respawn on the mountain. Now you will want to drive off that same ramp but this time, hold X and press UP, DOWN, and then let go of X and press UP + Y simultaneously. If done correctly, you will again see the word COMBO on top and this time your rider will have a yellow electrified effect. Land it as well to register the "Y" combo.
Finally, by now you should have a burning orange bar of boost. This is required for the "B" combo. If you don't, simply do some tricks on or off the mountain to build it up. Once it's orange, head off the ramp once more, hold X and press UP, DOWN, and then let go of X and press UP + B simultaneously. When you land it, you should see the word COMBO again, your rider with a red electrified effect, and the achievement will pop instantly!
By the way, it is also possible to do different combos if you replace the UP, DOWN, UP and instead use the following inputs for each of the three button types but this is not necessary for the achievement. Here they are anyway for those who are interested:
LEFT, RIGHT, LEFT
RIGHT, LEFT, RIGHT
DOWN, UP, DOWN
still took me a few attempts 
but ive done it i would of never done it without the guide so thanks 
Barad
Firstly, start exploration in "The Dunefield" in the main career, as this counts as an event you will have unlimited time to work on this without any trouble from the AI or time limits. Make sure to choose a bike with a high trick stat such as the KTM Freeride. Now, you must perform an 
, 
& 
combo trick each, but not in the same jump but individually.
You can perform all 3 tricks on the jump located directly in between the 2 pyramids, the jump leads over the river to the other side, just keep driving forward once you load into the map until you see the large twin pyramids. There are various button combinations that can be used, but not all are known for & . The 3 basic ones you can use are as follows;
Note: For the & combo trick, you are letting go of just before pressing the corresponding button to your trick.
combo = HOLD + 
LEFT, RIGHT, LEFT (Paparazzi)
combo = HOLD + LEFT, RIGHT, LEFT (Eagle)
combo = HOLD + LEFT, RIGHT, LEFT (Lazy Sunday)
