While the company did not provide a complete list of those "participating retailers," it named GameStop, Amazon.com and GoGamer.com in today's announcement.

It should be noted that the discount does not apply to EA's own online store. Instead, those who pre-order Mass Effect PC from the EA Store will, while supplies last, receive trinkets--including a poster and a comic book--from EA Redwood Shores' space horror effort Dead Space (PC, PS3, X360).

Originally developed by now-EA subsidiary BioWare and released on Xbox 360 last fall, Mass Effect was ported to the PC with the aid of indie developer Demiurge Studios. The PC edition sports a number of additions and improvements, such as free downloadable content and a redesigned interface.