Just finished prototype 1 and 2 for the first time since I was a kid. Very fun and definitely recommend both, but you could probably get away with just 2.

I should not have been playing a game that violent as a kid lol

The message, especially in the second one, is actually pretty positive. And the dark humour even in mission objectives is awesome. My favourite example being that you find out some of the scientists you have in a helicopter are trying to do eugenics, so your objective is to fly them as high as possible and jump out to "fuck over the scientists". Lol