93		Blackjack (DOS, 1984)
50		Yu-Gi-Oh!: Legacy of the Duelist (Windows, 2016)

Notes: Games similar to 21, Games like 21, PCC, Inc., DOS, Simulation, Strategy, Tactics, Cards, Tiles, Casino, Gambling, Turn-based, Top-down, Card, Tile game - Blackjack, PC, Game Similarities.