Here is the full list of all 45 Tony Hawk's Pro Skater 5 achievements worth 1,000 gamerscore.
Bailed 750 number of times
Grinded for 200,000 total meters across all games
Reached Player Level 50
Earned 250 total Stat Points
Manualed for 100,000 total meters across all games
Performed 500 Special Tricks
Earned 100 total Stat Points
Unlocked 50 Emblems
Performed 25,000 total Tricks across all games
Acquired $25,000 total Cash across all Careers
Achieved a Sick Score on all Missions in Asteroid Belt
Achieved a Sick Score on all Missions in The Bunker
Reached Player Level 25
Achieved a Sick Score on all Missions in Rooftops
Unlocked 25 Emblems
Acquired 10 new Heads
Acquired 10 new Bodies
Achieved a Sick Score on all Missions in Mega Park
Unlocked Asteroid Belt
Achieved a Sick Score on all Missions in School III
Unlocked The Bunker
Achieved a score of 50,000,000 across all games
Unlocked Rooftops
Achieved a Sick Score on all Missions in Bonfire Beach
Unlocked Mega Park
Acquired 10 new Decks
Purchased an item in Customize Skater
Acquired the Master Emblem for any Level
Completed all PRO Missions in any level
Unlocked 10 Emblems
Completed your first PRO Mission on any level
Unlocked School III
Achieved a Sick Score on all Missions in The Berrics
Completed all Gaps in any Level
Reached Player Level 10
Unlocked Bonfire Beach
Completed all Skate Tutorial Missions
Rated 25 total Create-a-Park levels made by other players
Completed all Freeskate Objectives in any Level
Earned a Stat Point by completing a mission at Pro Level
Landed a 250,000 Point Combo in any mode
Achieved a Combo Multiplier of 25 in any mode
Rated 10 total Create-a-Park levels made by other players
Rated a Create-a-Park level made by another player
Uploaded a Create-a-Park level