game engine

I apologize if this has been explained elsewhere, the search function didn't turn up much so I figured I'd just ask. I'm trying to figure out what exactly the combat difficulty setting does in Fallout 2. A few posts I've seen on other forums say it lowers the enemies perception, or reduces...

Do any of you guys know any decent game engines that are free to use/cheap subscription ? I thinking about making a game and I need to find a decent game engine. I don't have that much experience but have certain got some through fallout modding ect. I downloaded unity and arn't sure whether to...