Here is the full list of all 36 Tony Hawk's Pro Skater 1 + 2 achievements.
Reach Career level 100.
Complete all Gap collections.
Earn the "Legend" Challenge Collection.
Earn a score of 10,000,000 in any park in a 2 minute session or single combo. Game Mods must be disabled.
Complete all "Hard" Get-Theres.
Earn the "Veteran" Challenge Collection.
Give 50 Letters in Horse.
Earn 5,000,000 points in Trick Attack across all playtime.
Earn 2,000,000 points in Combo Mambo across all playtime.
Paint 100 surfaces in Graffiti across all playtime.
Unlock Officer Dick.
Find every alien plushie.
Spend $10,000 in the Skate Shop.
Land a 1,000,000+ point combo.
Achieve a High Score of 1,000,000+ on any classic Park.
Complete every goal in THPS2 Classic and gain all gold medals.
Achieve a judge score of 99.9 on a competition run.
Complete every goal in THPS1 Classic and gain all gold medals.
Find all Stat points for any Pro Skater.
Get hit by the Bull in Bullring.
Get hit by a vehicle on every map that features them.
Unlock Bullring in THPS2 Classic.
Earn any 4 Medals on competition parks in Tours.
Unlock Roswell in THPS1 Classic.
Earn the "Rookie " Challenge Collection.
Create a new park and upload it.
Place 500 objects in CAP.
Complete a match in multiplayer.
Unlock School II in THPS2 Classic.
Bail a 100,000+ point combo.
Earn a Medal on any competition park in Tours.
Reach Career level 10.
Break 20 Panes of Glass.
Land a 50,000+ point combo.
Create a skater using the CAS system.
Unlock School in THPS1 Classic.