The Entertainment Software Association (ESA) has removed ID Software from its roster of members after the creator of Doom declined to renew its membership.
The gaming giant, which also developed such classics as Quake and Castle Wolfenstein, has refused to elaborate on its decision.
However, ID Software's exit from the industry body follows similar decisions by three other major games firms.
Activision, Vivendi, and LucasArts all recently decided to leave the ESA for undisclosed reasons.
The ESA is responsible for the annual E3 Media and Business convention in Los Angeles, and there is speculation that the departure of some of the most prominent members is a result of the costly cancellation of the 2007 show.
Reports at the time suggested that costs related to the show rose to the extent that many ESA members were reluctant to support the event.
Membership subscriptions have also seen a recent hike, which may have contributed to the departures.
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