Blackjack · [HOST] · Doom 3 · Doom 2: Hell on Earth · DOOM · Head Soccer · Bloxorz Zap and Destroy · Zombie Pacman · Zombies Can't Jump · Zombies Can't Jump. . Blackjack is a casino banking game. This family of card games also includes. It is the most widely played casino banking game in the world. It uses decks of 52 cards and descends from a global family of casino banking games known as "twenty-one".