Done with a collectible guide and reloading saves after choices I think this could be done in 5-10 hours with a single playthrough. Even if forced to 2 playthroughs, 15 hours at the absolute most with cleanup and such. Too bad too, it is actually quite fun. But I was hoping for A LOT more. I like X-Men way more than Batman, but I guess Arkham City will have to scratch my super hero itch, cause this one isn't going to do it.