Games that try too hard to be mature.

[Reasonable]

Huya said:
How can Gears of War 1 be childish if there is hardly any dialogue in the game

Let me reverse that, do you think it's characters and tone is mature?  To me it comes over like a demented 13 year olds fever dream of futuristic military action after seeing Aliens on TV late one night.

I mean, I think it's a fantastic game, very, very well designed and exectured.  But in tone and style it's really pretty immature - although that's one of it's attractions.

I guess I'm saying it's Rambo 2 and not The Hurt Locker, if you get what I mean.