The essence of Catch-22 is that if you are concerned enough for your safety to ask to be declared insane, then you are sane enough to go into battle. The essence of Catch-23 is that if you stop breathing, you can't write anymore.
Joseph Heller was never played in a game.
Thankfully, the author of The Naked And The Dead has aligned himself with the latter.
(d) November 10th, 2007