4 Fantastic Vikings Go Ice Fishing combines 4ThePlayer's cash-symbol fishing format with Yggdrasil's Viking characters. Money Ways pays cash prizes through matching ways, with prize values growing from left to right. In Fighting Respins, Vikings can collect, multiply or increase cash prizes, and nets can reserve a prize for the next respin. Hross the walrus can add respins, while Persistent Ice Blox increase their cash value during the feature. Giant Ice Blox in the base game occupy several positions before breaking open. These mechanics belong to this ice-fishing edition, rather than every Fantastic Fish sequel.
To compare related slots formats, read the rules of 4 Fantastic Fish and 4 Fantastic Fish Amazon Adventure.
The library also explains the difference between lines, ways and clusters to help put these mechanics in context.
Source: published game information.