Blackjack is an unlicensed NES game offering a digital version of the classic card game. Gameplay would involve the player attempting to reach a score of 21 without going over, competing against a virtual dealer.  Variations in rules are not known without further research.  It is likely a simple version of Blackjack without intricate features.  The developers and publishers remain unverified.

Blackjack (USA) (Unl)

Black Bass 2, The (Japan)