Good point.
My problem with the games is that they're simply lame. I, being Christian, as well as many of my Christian friends, love videogames, even violent ones (though, if the entire pull of the game is simply that it's violent, then I think it's stupid. Give me good gameplay over shock-value any day), but having your enemies "repent", is just plain dumb. I certainly want Christians to make games (I plan to someday), but I want games that are fun to play.
Preaching a message is fine. MGS, one of the most popular games to date, preaches like crazy (only instead from a secular viewpoint). Many games out there preach some sort of message, or at the very least, the writers point of view on subjects. Xenogears is another perfect example of a game preaching, but from a secular viewpoint.
I think games that told a story from a Christian viewpoint would be cool, but first and foremost, they should be entertaining. Not even I would play a game where my enemies simply repent. If it happens to some particular protagonist within the story, that's fine, but not as a way of overall "defeat" for everything that stands in your way.
I think part of this is that these guys are trying to make games that are for all ages. That's fine if that's their goal, but I just hope they're not under the stupid impression that making something more realistic, or violent, is somehow evil and anti-Christian. Just look at The Passion. It's one of the most violent movies ever, and I certainly wouldn't want little kids to see it, but it's a great movie, and Christian through and through.
Personally, I someday hope to make "Christian" games. But make them like MGS, where the story (worldview) isn't so one-sided, or obvious, that only Christians will enjoy it. A good example is LotR (the books, not the games). They're very Christian, but in a way that you pick up on it (particularly if you're Christian), not where you feel you're just reading a sermon, with a story and interesting characters attached.