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