When does arkham city come out (pc)?

The only reason why I want to know is because I got a code to download it when i bought a new graphic card. On it, it says its available for download October 18, but everywhere else it says the game comes out november. Was it suppose to be released October 18 and it just got delayed to november?When does arkham city come out (pc)?
PC it comes out in November, on console it comes out in OctoberWhen does arkham city come out (pc)?
Batman: Arkham Asylum is third-person Action-Adventure game that delivers an authentic Dark Knight experience rooted in an original and engrossing story as well as a combination of melee combat, stealth, investigative and speed-based challenge gameplay. A sequel to 2009's Batman: Arkham Asylum, Arkham City features the full range of classic enemies seen in the previous game, in addition to Catwoman, who is a playable character and has her own storyline in the new release. Additional features include: a range of new gadgets, an increased number of possible melee opponents and a range of movement options for Batman that include leaping, sliding, gliding and the grapple hook.When does arkham city come out (pc)?
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