A HighRoller is a 5-game pack.
These 5 games are automatically played at the stake you have chosen.
You can choose between Classic or Premium, and depending on your choice, the cost is 20 to 30 times your stake.
During a HighRoller, bonus symbols that are considered losing are stored.
If you manage to collect the required number (between 3 and 4, depending on whether you chose Classic or Premium), you get access to the bonus.
Only one bonus is available per HighRoller. With each new HighRoller, the bonus counters are reset to zero.