I enjoyed playing this game. It appears to be cheesy until you realize the plot twist. I don't want to spoil it though
Adam's Venture was OK, never bought it though because I played a trial version and beat the first episode in about 6 or so hours. It's art style is great, but the game is lacking in content, mostly traveling and bible trivia.
Xrucifix (no link)
Rated M, this game covered the spiritual battle of a person considering suicide. You control an angel who's goal is to save the boy by driving out the demons that plague him, and turn the boy to God. Sadly the dev and the game disappeared a while ago
Axys Adventure - Truthseeker http://www.therebelplanet.com/product/a ... uthseeker/
I played the demo of this game, and remember it being fun and challenging. Another trivia game, but its not pure trivia, it gas platforming and puzzles too. I should probably give it another go and see if its worth buying
Left Behind game (CD game for PC)
This game got a bad reputation for the kill or convert system and a few other things too iirc, but if you can get over those things, its actually a fun game. Its not the best example of a christian game, but I figured its worth adding for completeness sake.
There are probably many lesser known games, but these are the ones that come to mind right now. Hopefully there are more games to come in the future.