Gamer Limit writes: "IGN has reported the other day that Resident Evil 5's mercenaries mode is not playable online. Just yesterday, IGN posted their final review, claiming sentiments three times in the actual review such as "No Mercenaries online? Really?". While I could go on complaining about the lowered score because of it, the real issue is: how did they screw this up?
The online community has gone up and arms lately about it. Reviews have been a hot topic as of late; some reviewers are being called out for not finishing a sufficient portion of the game before finalizing a review. Others, like IGN, push false information before confirmation."
Update Additional Confirmation: An excerpt from an interview with Takeuchi on Dengeki a day before IGN posted the review confirms Online Mercenaries Co-op.