www.EnigmaWorldCodeGroup.com has a free U-boat 4-rotor Enigma code simulator up and running for submarine gamers to use and enjoy. You can send and receive encrypted messages with friendly subs, and maybe you can even intercept and decrypt messages between enemy subs! The simulator comes with professionally prepared instructions and authentic U-boat documents, including the dreaded bigram tables that almost made the Enigma cypher unbreakable by the British and American code breakers at Bletchley Park in England during World War II.
Add some real history to your games. Go with Enigma.
