I'm interested in Bioshock but I'm wondering how much gameplay I can expect from it? I just borrowed CoD4 and finished the single player campaign in less than 7 hours on hardened. Needless to say if I had spent $50 on it I would have been pretty pissed since the multiplayer in that series doesn't interest me much at all. Roughly how many hours of gameplay is included in Bioshock?
Hard to say, and depends on your gameplay style...if you explore every nook and cranny of Rapture, the value of the game is well worth the price of admission.
The tonics and plasmids allow for different play styles, so I will sometimes revisit areas just to try out different combinations...some are more useful than others, and I typically use the same two or three plasmids in combat situations, but the others are fun to experiment with.
Also, the audio diaries help to flesh out the game world, and it is worth taking the time to search for them.
If you are a run and gun FPS player, you probably won't like BioShock...if you enjoyed System Shock 2, then will you kindly pick up the game.