It first trended for over a decade and was later introduced in 2004 by Diamond Games. While Pirate 21 isn’t the latest Blackjack variant, it’s not very common in casino sites. The birth of the virtual or online casino paved the way for lots of blackjack variations, including Pirate 21. Side bets were rare, and the common Blackjack forms included single and double-deck. History of the Gameīefore online casinos came, Blackjack had limited forms, and every Blackjack table had varying rules. The major difference between the Blackjack deck and the Pirate 21 deck is that the 10s are absent in the latter. It’s played with the Spanish deck of cards (48 cards). It’s also referred to as “Pontoon” (for Australian players) or “Spanish 21” - and both have similar gameplay. Pirate 21 Blackjack is an online table game developed by Betsoft. Pirate 21 Guide: Understanding What Pirate 21 Is Read this Pirate 21 Guide to learn about the basic game rules, how to play, the odds, the payouts, and the game’s strategies. Pirate 21 has a low house edge, but it comes with an interesting side bet and spicy payouts. However, if you’re looking to learn more about the game, we’ve prepared a Pirate 21 Guide for you. Unfortunately, we can’t confirm if they were lovers of this popular online table game. If you’re hearing the “Pirate 21” name for the first time, you may be wondering how pirates played Blackjack.