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