Question:  PartyCasino is an online casino first launched in 1997 under the name Starluck Casino before relaunching again in 2006, the casino offers over 500 games, like which comparing card game between usually several players and a dealer, where each player in turn competes against the dealer, also known as twenty-one?

Context paragraphs:
Eurogrand: EuroGrand Casino is an online casino, where users have access to animated casino games, including blackjack, roulette, video poker, slots games and online scratch cards.  There is also a live casino facility, where users can access a live video stream to play at a casino table being operated by a professional casino dealer.  The site also operates a mobile platform, which allows users to access the site from mobile devices.

Guts (card game): Guts is a comparing card game, or family of card games, related to poker.  Guts is a gambling game involving a series of deals of 2, 3, or 4 cards.  Hand are ranked similarly to hands in poker.  The betting during each deal is simple : all players decide whether they are "in" or "out", and announce this at the same time.  Each deal has its own showdown, after which the losers match or increase the pot, which grows rapidly.  A round of the game ends when only one person stays in and wins the pot.

Blackjack: Blackjack, also known as twenty-one, is a comparing card game between usually several players and a dealer, where each player in turn competes against the dealer, but players do not play against each other.  It is played with one or more decks of 52 cards, and is the most widely played casino banking game in the world. .  The objective of the game is to beat the dealer in one of the following ways:

PartyCasino: PartyCasino is an online casino first launched in 1997 under the name Starluck Casino before relaunching again in 2006 as a fully integrated platform.  The casino offers over 500 games ranging from casino classics like Blackjack and Roulette to a wide variety of online slots.

Star Wars Customizable Card Game: Star Wars: Customizable Card Game (SW:CCG) is a customizable card game based on the "Star Wars" fictional universe.  It was created by Decipher, Inc., which also produced the "Star Trek Customizable Card Game" and "The Lord of the Rings Trading Card Game".  The game was produced from December 1995 until December 2001.  Operation and oversight of the game was then taken over by a Decipher created volunteer group called the Star Wars Customizable Card Game Players Committee.  To date, the Players Committee, or PC, still runs the game and creates new cards known as "virtual cards" that are released online in PDF format, and can then be printed and played with.  "SW:CCG" can also be played online: Holotable.com is the official Player Committee platform.

Card counting: Card counting is a casino card game strategy used primarily in the blackjack family of casino games to determine whether the next hand is likely to give a probable advantage to the player or to the dealer.  Card counters are a class of advantage players, who attempt to decrease the inherent casino house edge by keeping a running tally of all high and low valued cards seen by the player.  Card counting allows players to bet more with less risk when the count gives an advantage as well as minimize losses during an unfavorable count.  Card counting also provides the ability to alter playing decisions based on the composition of remaining cards.

Bank (card game): Bank, also known also as "Polish Bank" or "Russian Bank," is a comparing card game.  The game requires a standard 52-card deck and five or six players.

Casino M8trix: Casino M8trix is a cardroom in San Jose, California.  The 8-story casino offers table games and a poker room.  Founded in 1946 under the name Garden City Casino, the casino secured one of the 15 card room licenses in San Jose.

Double Exposure Blackjack: Double Exposure Blackjack (also known as "Zweikartenspiel" German: ""Two card game"" ) is a variant of the casino game blackjack in which the dealer receives two cards face-up in part of the initial deal.  Knowing the dealer's hand provides significant information to the player.  To maintain the house edge, the payout when the player receives a natural blackjack is reduced to even money from 3:2, and players lose their bets when their hand is tied with the dealer.  In addition, with both dealers' cards exposed at the outset, players cannot buy insurance or surrender their hand.

Casino War: Casino War is a proprietary casino table game based on the game of War.  It is distributed by Shuffle Master, a division of Scientific Games.  The game is one of the most easily understood casino card games, and is one of the only card games where players can beat the dealer more than 50% of the time.

Supporting paragraphs: PartyCasino Blackjack
Answer: Blackjack