Here is the full list of all 24 Riptide GP: Renegade achievements.
Beat Krex in the final showdown in Career.
Reach level 20 in Career.
Break all the fountains in Fountain Park.
Own 4 hydrojets in Career.
Earn 1st place in any Freestyle event.
Reach level 15 in Career.
Reach level 10 in Career.
Earn 1st place in any Career Championship event.
Upgrade any hydrojet to its max.
Earn 1st place in any Elimination event.
Earn 1st place in any Slalom event.
Reach level 5 in Career.
Earn 1st place in any Race event.
Find one Easter Egg.
Find nine Easter Eggs.
Perform a level 10 stunt off a wave in The Ruins.
Earn 2nd place or better in all Career events.
Earn 1st place in all Career events.
Beat Weaver in the second 0xDEADBEEF sidequest.
Own 9 hydrojets in Career.
Perform the Logroll stunt off a log jump in Firewater.
Continuously boost for 30 seconds on any level.
Jump through all the radar dishes in Unicorn Base.
Beat Lt. Pane in the second Vyper sidequest.