How long is Batman: Arkham Origins?

Batman: Arkham Asylum: 7 Best Things About The Game (& 3 That

Confronting Poison Ivy - Batman: Arkham Asylum Guide - IGN

Batman: Arkham Asylum Retrospective - gameblur

In Batman: Arkham City (2011), you can find Harley Quinn's outfit from Batman: Arkham Asylum (2009) in Joker's Fun House, complete with Warden Sharp's ID tag. : r/GamingDetails

Is It Possible to Beat Batman Arkham Asylum with No Upgrades?

Just beat Arkham Asylum and heading to Arkham City now, any tips before I begin? : r/BatmanArkham

Give me a challenge to complete Arkham city with, like only taking down thugs with beatdowns : r/BatmanArkham

Batman: Arkham City - Game of the Year Edition on Steam

Steam Community :: Guide :: 100% Achievement Guide: Batman - Arkham Asylum

Objective complete - Batman: Arkham Asylum