Portal is casual? I remember starting it, going oh shit this is funny! then playing it, with the goad in mind to beat the puzzles to see the ending :P A start - line out path - and an ending. Thats a one way arrow in my book lol. But in terms of playability I would rate portal more towards the casual end than the hardcore. It's a puzzle game after all right?
Edit: So I'll agree that portal is one of those games that could go either way. I'm not sure what your reasons were for playing it, but my personal reason was to get through the story/dialogue, and if I had quit halfway through and forgotten, I'd have to go through again to get the whole experience.
From 0 to KICKASS in .stupid seconds.








