Here is the full list of all 41 Infinite Air with Mark McMorris achievements.
Complete 50 different runs.
Perform 100 rail tricks.
Perform 200 aerial tricks.
Grind for a cumulative total of 1 minute.
Score over 9000 on a Backcountry run or in Free Ride.
Accumulate a total of 10 minutes of hang time.
Score 90 or better on a Big Air competition.
Land a 1440 Triple Cork.
Land a 1800 Quadruple cork.
Win 25 competitions.
Win your first competition.
Win 5 competitions.
Unlock an item on the Circuit.
Fly the helicopter a total of 50 miles.
Do 2 different grabs in one trick.
Complete the same run 10 times.
Land 3 different tricks perfectly in a row.
Play every run type.
Complete any Big Air run.
Complete any Halfpipe run.
Publish your first replay from Free Ride.
Complete any Slopestyle run.
Complete your first run.
Complete any Backcountry run.
Customize your gear.
Create and publish a Big Air run.
Create and publish a Halfpipe run.
Create and publish a Slopestyle run.
Live Ride with another player.
Complete any tutorial lesson.
Unlock the second tier in Circuit Mode.
Unlock the third tier in Circuit Mode.
Unlock the fourth tier in Circuit Mode.
Unlock the fifth tier in Circuit Mode.
Unlock the final tier in Circuit Mode.
Achieve all of the possible points in Circuit Mode.
Beat Mark McMorris at his own game.
Land 7 different tricks perfectly in a row.
Unlock all playable characters.
Score 90 or better on a Slopestyle competition.
Score 90 or better on a Halfpipe competition.