Rollero features a diverse selection of slot games, including the popular 'Book of Cleopatra'. This title operates on a standard 5-reel, 3-row grid with 10 adjustable paylines. Gameplay centres around landing matching symbols from left to right across these paylines. The game's theme is inspired by ancient Egypt, with symbols such as scarab beetles, pyramids, and the titular Cleopatra. The 'Book of Cleopatra' symbol serves as both a wild and a scatter, a common mechanic in 'Book of' style slots that simplifies symbol matching and triggers the main bonus feature.
The primary bonus feature in 'Book of Cleopatra' is the Free Spins round, triggered by landing three or more Book of Cleopatra symbols anywhere on the reels. Upon activation, players are awarded 10 free spins. Before the spins commence, one symbol is randomly chosen to become a special expanding symbol. During the free spins, if this chosen symbol lands on the reels, it will expand to cover its entire reel, provided it can contribute to a winning combination. This expanding symbol mechanic can lead to significant payouts, especially on higher-value symbols. The game is known for its medium to high volatility, meaning wins may not occur frequently, but when they do, they have the potential to be substantial. The Return to Player (RTP) is generally reported to be around 95.5%, which is within the typical range for this type of slot.