Hmm, I've used the C4 engine. It's pretty....terrible.
At least it was a few years ago, I haven't touched it in a long time. There aren't really any games that have been made with it.
Platinums: Red Dead Redemption, Killzone 2, LittleBigPlanet, Terminator Salvation, Uncharted 1, inFamous Second Son, Rocket League