There are many Vikings Go Berzerk Reloaded bonus features you can benefit from during the Free Spins Round. But first, to trigger the Bonus Round, you’d need to land 3, 4, or 5 Scatters, for which you’ll get 7, 8, or 9 Free Spins, respectively. If you trigger them with 4 or 5 Scatters, you’ll additionally get 1 or 2 Berzerk Vikings, respectively.
During the Free Spins Round, the Vikings fight an evil Siren. Those in Berzerk mode always win the fight. If the Vikings win the battle, they become Sticky Wilds for the duration of the Bonus Round. During the Bonus Round, though, Wilds can also upgrade to 2x, 4x, or 8x Wild Multipliers.
Now, other things are happening during the Free Spins. Treasure Chest symbols, which reveal different prizes, can appear. These prizes can be 1 or 2 Sticky Wilds, 1 to 3 extra Free Spins, an extra Berzerk Viking, and 1 Free Spin or double Wild Multipliers of up to 8x.
At random, a Ragnarok Spin can be triggered. For that one spin, all Vikings are in Berzerk mode, meaning they all turn Wild as they’ll all win their battles. This feature is not exclusive to the Free Spins but can also appear during the base game.
Finally, you should know that you can trigger the Free Spins organically or buy them if the option is available in your country. And then, after they've been triggered, you can gamble them. If you win the gamble, you start the Bonus Round with 1 to 4 Vikings in Berzerk mode. You lose the gamble – you lose the Free Spins completely.