A video game in which after a certain number of flushes had been awarded (for a group of similar machines), the payout for the next flush would be increased to 25-1, the same payout for the much rarer four of a kind (in Jacks or Better video poker). The Flush Attack feature made the game positive. It was exploited and can no longer be found.
A video poker game in which the wagering of a sixth coin (assuming the base game is a five coin max game) triggers a new mode in which two cards may be summed together and used to form a four of a kind or quad (with three other cards). The return of a Quick Quads video poker game is always better then the return of the base game. The Quick Quads feature, however, increases the variance.
A video poker game in which the wagering of a sixth coin (assuming the base game is a five coin max game) triggers a new mode that gives the player a bonus whenever there is a (natural) four of a kind. The average bonus is approximately 428 units, and it increases the return (relative to the base game) of all video poker games except for (most) wild card games, such as Deuces Wild. The Wheel Poker feature increases the variance of games and necessitates strategy changes to achieve the best return.
