Portal: Revolution, even for a fan-made game, is great. Puzzles are fun and innovative, using concepts that could've been explored in Valve titles without any of the frustrating ultra-difficulty found in other fan-games. Unfortunately, they did also heavily rely on looping--doing the same sequence three or four times in a row--which often grew monotonous.

Environments were gorgeous with a glorious blend of nature and sterility that made them fun to explore. I know some people have reported glitches or softlocking. I personally experienced neither.

The one key area the game let itself down was the writing. The reason I still rate Portal 2 so highly over a decade later is for the strength and genuine humour in its character voices and narrative; comparatively, Portal: Revolution sits firmly in its shadow. While the conceit was good, the story was otherwise the same as Portal 2 in almost every way.

Stirling, in particular, felt like a bootleg version of Wheatley with none of the narrative sense. Why would Stirling want to reactivate GLaDOS when he also admits he's terrified of her? It could have been an easy sell: maybe she allowed the other artificial intelligences to do as they want; maybe they revered and feared her in equal measure. Instead, his characterisation was muddied and confusing, echoing Wheatley in all the wrong ways.

While I also realise this was a fan-game, designed to bulk out resumes--however the decision to just cut to black at the end of the game was a confusing one, especially after the agonising process of setting everything up.

Overall: a great fan game that aspires towards both the spirit and puzzles of the original game, but fails to capture either.