Shaun White Skateboarding
44 Achievements
1,000
20-25h
Trip 'em up
Use 10 power ups to affect opponents in one multiplayer match
20
How to unlock the Trip 'em up achievement in Shaun White Skateboarding - Definitive Guide
Go to the grindable x spot with the power up in the middle, next to the pool. Have your partner just idle somewhere by it and just keep grabbing the power up and use it on him/her. The only power ups that are able to effect your opponent are the slug (yellow) and the skateboard (purple). Turn towards your partner and wait til the crosshair lines up and fire away (press x). Do this 10 times and the achievement is yours.
UNOBTAINABLE DUE TO SERVER CLOSURE
First off, the power ups are random and gained by picking up the white glowing orbs. You can do this and Infinite Arsenal in the same match. The only power ups that can be used on an enemy are a Pink Slug looking thing and a Purple Justice Scale. You will know you have one that can be used on an enemy when an Iron Cross comes up on your screen. Once you have that, find your opponent and wait for the cross hairs to turn red. Once they do hit then rinse and repeat 9 more times.
Only two of the power ups can be used to attack other players. The slug, and the power up with the pink outline and black arrow, can be used on enemies. When picking up these two power ups, a red iron cross reticule will appear. Have your boosting partner stand still, and lock the iron cross onto them. Then use the power up, and it will count towards the ten. If you get a power up that can't be used against your boosting partner, use it immediately and then grab another power up. I would select a 15 minute match to ensure you get enough useable power ups. I found the best place to do this is on the “Ministry Rooftops” map. By the pool area you will see a concrete structure on the ground, which looks like a cross. On the center of the cross there is a power up. It is easiest to keep grinding back and forth on this structure, picking up the same power up. Have your boosting partner standing right next to this structure, and it will make this achievement very easy.