Puzzle based modification for Source engine. Two world dimensions + two timelines, simple but unusual gameplay mechanics.
Good stuff.
It is a VERY interesting concept.
Portal like game! Great
This is awesome. I've never seen such a clever and innovativ gameplay. I don't even know when I had to use my brain so intensively in a game at last. It would be a big loss if you wouldn't go on with your idea. Thanks for sharing!
Great mod, even though i don't like games focused only on puzzles.