Worth playing through multiple times?
There are two kinds of games, as far as I'm concerned -- games that are only tolerable once (so you must collect all achievements through your one-and-only playthrough), and games that you can play through several times (so you can do the first for fun, without worrying about achievements, another achievement-driven playthrough, and another cleanup playthrough if necessary).
Which type is this?
I've tried to do everything at once -- overwhelming.
I've tried to just play -- worried about replayability.
So, is it worth playing through it for fun before worrying about achievements? Will the replay be a drag?