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