Well, here's some of my favorites:
My personal favorite is Bible Hangman from Tim's Freeware. Click on Word games, download & install:
http://www.timshen.truepath.com/I prefer to turn off the non-Biblical categories (animal, nation, & cities), and play in multiple puzzle mode.
This game has been a benefit to my spiritual life (how many games can that be said about!). Frequently I will encounter a word I do not know or remember, and out of curiosity go to my Bible program to look it up.
Here are some of my other links for Christian games:
Free Online Games:
http://www.biblequizzes.com/ -- has good Bible crossword puzzles.
http://www.biblestudygames.com/biblegames/ -- good crossword & word search games.
http://gci.gospelcom.net/kc/ -- a few games for little kids.
http://www.kingscall.org/ -- Flash based graphical adventure game kinda like Pilgrim's Progress.
http://www.churchweb.com/biblegames/biblegames.htm-- several other games of mediocre Biblical quality.
Downloadable Free Bible Games:
http://www.timshen.truepath.com/ -- Tim's Freeware as above. Several good games . . .
http://www.castle-ent.com/ -- haven't checked these out yet
http://www.newtestamentchurch.org/html/Downloads/SoftwareDownloads/ChristianGames/Christian_learning_games.htmHere are some oldies but goodies. My favorite, especially for kids, is Bible Concentration 3.0 for DOS. It still plays under Windows, but you'll only get PC speaker sound unless you're really good at setting up Soundblaster compatibility in DOS under Windows. Of course being DOS based, you need to figure out how to make your own directories and shortcuts.