what is best game engine?

me first , i like UE and Unity

The Unreal Engine is arguably the most useful for building great games. Unity seems to be a bit more clunky in comparison and can be harder for some to navigate.

Unreal for sure!
Also Source bc I got a thing for valve

RPG Maker for beginners, Game Maker for intermediate.

Of course Unreal. It is a very simple engine

Unreal is so simple and so much great games were made on it. Source should be praised too.

I like Unity well , RPG Maker not bad either

Unreal Engine and Unity are my favorite in my opinion because they are just really easy to use

probably source if we're talkin simplicity and complexity but if we're talking about pure power then either source2 or unreal4