Alright, I'm going to be super greedy right now and request help with *three* games.
The first is a recent one, possibly in the last 5-6 years. I played a demo of it on the PC and the plot was that some aliens were attacking Earth and you had to stop them. It was sort of an RTS, however I don't think there was any base building. The biggest thing I remember was that you could choose which side of the military you would play as. I remember the first choices were 'Science' or 'Firepower'. After each level you would get a new unit. With Science, you would get some unit that could shoot through walls and with Firepower, I remember something about napalm...
The second is once again for the PC, however it's possibly older. I played it maybe 5 years ago, and I think it was really old back then, so not much help there. It was a 3D, 3rd person RPG. It had fairly basic 3D graphics, but the main things that stood out to me was that you would travel in a massively open world and that you would, when creating your character, have to add details about his backstory including his relation with his parents or something. The plot was centered around some demon/devil that had come to the kingdom and you could either destroy him or join him. I remember the title being some 'Knight(s)'.
And last, but not least, is an even older game. Again for PC, but it could have been for DOS, as I played it on 95. It was a first-person driving game, where you could go around running people over. It had sprite graphics. Other stand-out things was that I once drove into a building (?) and picked up a box of donuts and the character said "Mmm, donuts!" in a really evil voice. However, that could be a figment of my imagination. I remember the box art distinctly, it had some bald headed guy behind a wheel, bathed in red light. Something in the back of my mind connects it with Death Metal...could be the soundtack?
Thanks in advance guys, I hope you can help!