This page contains Tony Hawk's Proving Ground Unlockables for Xbox 360 called "Secret achievements" and has been posted or updated on Oct 23, 2007 by hicksj21. Let us know what you think of this Unlockable by thumbs voting.
Additionally there are seventeen secret achievements, two of which are currently unknown.
|Unlockable:||How to Unlock:|
|Aggro Episode (10 pts)||Mike V's Go Epic episode completed.|
|Bowl Skating Episode (25 pts)||Lance's Bowl Skating episode completed.|
|Build Your Team (10 pts)||Achieved "Build Your Team" Game Milestone.|
|Climbing Episode (15 pts)||Bam's Climbing episode completed.|
|Deck Milestone (10 pts)||Achieved "Get Your Own Skate Deck" Game Milestone.|
|Join Team Milestone (30 pts)||Achieved the "Join Team" Game Milestone.|
|Mod the World Episode (25 pts)||Daewon and Rodney's Modify the World episode completed.|
|NTG Episode (15 pts)||Bob's Nail the Grab episode completed.|
|NTM Episode (25 pts)||Stevie's Nail the Manual episode completed.|
|NTT Episode (10 pts)||Arto's episode completed.|
|Rigging Episode (10 pts)||Jeff's Rigging episode completed.|
|Shoe Milestone (10 pts)||Achieved "Get Your Own Skate Shoe" Game Milestone.|
|Skate Check Episode (15 pts)||Dustin's Skate Checking episode completed.|
|Sponsored Milestone (15 pts)||Achieved the "Sponsored" Game Milestone progress.|
|Team Built (20 pts)||Achieved "Team Built" Game Milestone.|
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