* EvenBetterSequel / SurprisinglyImprovedSequel: A big part of their reputation is making heavily improved sequels to high profile releases, such as KnightsOfTheOldRepublic, Fallout3, and NeverwinterNights, by exploring new concepts and ideas for story.
* FanPreferredCouple: Most likely unintentional, but every one of Obsidian's titles where romances are present almost invariably results in the fans embracing a character who is ''not'' available. ''[[KnightsOfTheOldRepublic Knights Of The Old Republic II]]'' has Bao-Dur and Mira, ''NeverwinterNights2'' has Neeshka and Sand, and ''AlphaProtocol'' has Sis. It's worth noting that different fans may prefer a non-canon romance in one game while preferring a canonical one in another.
* WhatCouldHaveBeen: A sequel to [[KnightsOfTheOldRepublicIITheSithLords KotOR II]] that would have continued directly after the ending of the previous game [[http://www.destructoid.com/obsidian-reveals-its-plan-for-potential-kotor-iii-259114.phtml was in pre-production at one point]] but unfortunately never got off the ground.