Shaun White Snowboarding
48 Achievements
19-23h
PS3
Mathemagician
You had the multiplier maxed out for so long I forgot that it changes!
5.3%
How to unlock the Mathemagician achievement in Shaun White Snowboarding - Definitive Guide
The easiest way I found to do this is by holding the RS halfway down and doing a butter. Do a few air moves to get the multiplier up and then once you're at around x2 or x2.5 multiplier start doing a butter either up on the RS or halfway down on the RS and keep that going for around a minute. The achievement will pop up while you are still getting points. So don't stop until the achievement pops up.
You can do backflips, with a park board, to get your multiplier up to 3 then just do a butter down the hill.
Keep the 3x multiplier up for one minute.
Go to the top of any mountain. I found this easier done at Alaska but it can be done anywhere. Get your score multiplier to 3x and just do butter spins or some easy backflips to stop your multiplier from going back down. You need to keep your muliplier at 3x for about a minute and this trophy is your.