1 - Only with 3rd party addons. C3 is a 2D engine and while you can achieve isometric games and such, you'll have to rely on 2D images only without 3D models.
2 - It is able to run games like that, but those games had very serious optimization techniques to keep the game running at a high framerate. You might want to read about that before starting a game like those. If you do start a similar game, make sure to test often on slower devices too (don't leave testing to the final stages of your project).