I think it’s fairly trivial to say that Portal is a significant and influential franchise, and that both titles in the series are excellent experiences well worth the time of any player. In fact, I would go so far as to say that the original Portal is such a cohesive and nearly flawless gaming experience that it should be remembered alongside such other towering encapsulations of solid game design and execution as Shadow of the Colossus, the original Half-Life, and (with an asterisk for its incomplete sections) the first entry of the Dark Souls trilogy.
But my praise for Portal 2, while still extensive and enthusiastic, is simply nowhere near as unmitigated or unending as my praise for Portal. In terms of its narrative, Portal 2 opted for a lighter tone, with a heavy emphasis on blatant comedy which marred the established atmosphere of Portal and the established character of GLaDOS. Meanwhile, in terms of gameplay, Portal 2‘s single-player campaign opted for easier puzzles overflowing with a large number of lightly utilized new mechanics.
Thinking, with Portals: