I love Portal, but it feels more like a tutorial than a puzzle game, because the tolerances on each solution are so large. It's a fantastic game, one of the al

I love Portal, but it feels more like a tutorial than a puzzle game, because the tolerances on each solution are so large. It's a fantastic game, one of the all-time greats, and there are tricky parts to execute, but it's not particularly challenging in terms of puzzling.