Killer Queens      Reg Gin    Gin Only    Okie
No Queens allowed. BUT if you have ALL 4 queens you advance. This may be played as Reg Gin, Gin Only or Oklahoma.

No Faces      Reg Gin    Gin Only    Okie
You may not have any face cards (K's, Q's, J's) in your hand. This may be played as Reg Gin, Gin Only or Oklahoma.

Gin Only W/Twist   Aces    3's   4's    5's    6's      7's    8's    9's    10's    Jack's    King's
This game you must have gin. No knocking is allowed AND there will be a twist such as no 4's allowed.

Okie Gin W/Twist   Aces  2's  3's  4's  5's  6's  7's  8's  9's  10's  Jack's  Queen's  King's
In this game your deadwood must be equal to or less than the upcard. If the upcard is an ace then you must have gin. If a spade is the upcard, points for that hand will be doubled. AND there will be a twist such as no 4's allowed.