I feel that the original two Portal games struck a perfect balance of being simple to understand but still complex enough to create plenty of deviously challenging puzzles.

I can't say the same thing for Portal Reloaded.

The introduction of the time travel portal is neat until you realize that it turns nearly every chamber in the second half of the game into a convoluted mess. Maybe I'm just dumb, but I had to use a guide more often than I did for the original games. Also, the game has no funny dialogue, so automatic downgrade.

Still fun, just a bit too difficult for me. But if you like a good challenge, give this mod a try!