Freebie!!
Riptide GP2 shifting from paid to free. Here it's their announcement
Highly rated across both Android & iOS.
There are some in-app purchases but not necessary at all to play or progress in the game.
About the game
Race across dynamic waves on rocket powered watercraft.
Riptide GP®2 kicks everything into overdrive, with upgradeable hydro jets and riders, improved graphics, an all-new career mode, and a whole new stunt system with dozens of new tricks!
Featuring rocket-powered hydro jets racing around futuristic tracks across a dynamic and interactive water surface, Riptide GP2 delivers a fast, fun, and visually stunning racing experience.
From Vector Unit, developers of acclaimed racing games Riptide GP, Beach Buggy Racing, Shine Runner, and Hydro Thunder Hurricane!
• • GAME FEATURES • •
• CHALLENGE YOUR FRIENDS
• Race against your friends' best times in the exciting VR Challenge mode.• ALL NEW CAREER MODE
• Play through Race, Hot Lap, Elimination, and Freestyle events to earn XP and cash that can be used to upgrade your hydro jet, unlock new stunts, and increase your rider's performance.• ALL NEW WATERCRAFT
• Collect 9 powerful new hydro jets, and upgrade their performance and colors to gain an edge on your competition.• ALL NEW STUNT SYSTEM
• Unlock and master 25 outrageous new stunts. Wow the crowd, charge your boost and make your competition eat wake.• GAME THE WAY YOU WANT
• Seamlessly supports multiple control configurations for tilt, touch-screen, and gamepad play.• GOOGLE PLAY GAME SERVICES
• Earn achievements and keep your game synced to the cloud with your Google account.• CUTTING EDGE TECH
• Powered by the all-new Vector Engine 4, Riptide GP2 builds on the original game’s stunning visuals, with extra-detailed HD graphics!
The free version has ads. Quote from the announcement, emphasis mine: