Viking Poker is a name used in some European land-based casinos for Caribbean Stud Poker. The rules are identical; only the label is different, and nobody knows for certain where the nickname comes from.
In Caribbean Stud, players compete against the dealer rather than against each other. Each player places an ante, receives five cards and then decides whether to fold or raise. The dealer needs at least ace-king to qualify; if the dealer’s hand does not qualify, the ante is paid at even money and the raise is returned. So if you spot Viking Poker on a European casino floor, you can relax: it is not a new variation you have never heard of.
Game names across markets
Regional names like this show that one game can travel under several labels. When localising a casino lobby, use the names players search for in each market and keep the standard name in the game information so both audiences find the title.