Portal: Revolution is a new fan-made campaign for Valve's popular puzzle game Portal 2, and it's now available free on Steam for owners of the game to install and play through.
Imagine an Americano coffee. That's portal 2. Now imagine a mug full of espresso coffee. That's portal reloaded.
Basically it's amazing, but mind bending. It throws in temporal mechanics to the original portal setup. For what it is, it's also impressively coherent.
You know how your brain kinda has to shift gears in order to "get" portal for the first time? Trying to "get" Reloaded was like rebuilding the whole damn gear system for me.