The main bonus feature you will encounter in the 12 Trojan Mysteries online slot is the Free Spins Round. This is triggered whenever you manage to land three or more Scatter symbols on the reels. You will be given 12 free spins to work through What makes these free spins stand out is the addition of the trojan horse mystery feature.
This feature also appears in the base game, and it is when the trojan horse symbol turns into a mystery symbol in order to create winning combinations. This is made better during the Free Spins Round as a metre will select which symbol it will turn into for the next spin. After each spin, the lowest remaining symbol is removed. This can lead to some of the biggest payouts you can get in the game. It can also be particularly fruitful when the mystery symbol becomes the Wild. You can also add more free spins to your collection by landing Scatter symbols.
If you don’t want to wait for three Scatter symbols to land when you’re playing, then you can always buy your way into the Bonus Round, thanks to the buy bonus feature. This is useful if you just want to try and get your hands on some big wins, but the Free Spins Round shouldn’t be too hard to trigger.