Rollercoaster Tycoon 3: Soaked

Soaked! (released June 21, 2005) is the first expansion pack released for RollerCoaster Tycoon 3. It adds new attractions such as pools, water rides, and special path items, as well as new roller coasters, new shops, waterfalls, water shows, tunnels and aquariums.

Unlike the RollerCoaster Tycoon and RollerCoaster Tycoon 2 expansions, Soaked introduced new game-play elements and proper new rides. It also features some Hershey's product placement due to the game's publisher Atari signing a deal with the Hershey's chocolate company.

thank you to: https://rct.fandom.com/wiki/Soaked!

Source: TheGamesDB