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