Developer Forbidden Island is a video slot by Naga Games with five reels, medium volatility and an RTP of 97.58%. The game centres on an island-themed treasure hunt, where symbols contribute to a Collection Bar above the reels. Filling this bar helps unlock further island features, with 100 collected symbols triggering the main Forbidden Island bonus.
The gameplay changes across different island levels. Low-paying symbols merge on the first island, four wild symbols are added on the second, and a random symbol appears in a checkered pattern on the third. In Forbidden Island mode, all low-paying symbols transform into high-paying symbols, altering the reel structure during the bonus sequence.
A Mystery Symbol can also appear on any reel and convert into a randomly selected paying symbol. Players can use the demo version to play for free and practice before playing for real money, while reviewing the slot’s collection-based bonus system and symbol-driven features.
