Call of Duty Black Ops PC Zombies hasn't worked for a week now

Call of Duty: Black Ops' Zombies mode has been unplayable on PC for a week now, leading to a glut of negative reviews on Steam.

Last week, players noticed a server error message pop-up when trying to access Zombies from Black Ops' main menu. Zombies is a co-op focused mode, but this issue prevents players from playing solo, too.

Here's how it looks:

Call of Duty: Black Ops came out nearly nine years ago, but it still enjoys a loyal playerbase, and they're expressing their anger via the medium of Steam reviews.

On Steam, players are pointing out Activision is still charging £30 (£60 if you want all the DLC) for a game in which one of its major modes doesn't work.

This isn't a server shutdown, as many people had feared and even claimed online. Rather, it appears to have taken Activision / Treyarch by surprise. We've asked Activision for comment, but a rep has said it's aware and looking into the issue.

Meanwhile, Black Ops players have been sharing workarounds. You can still use the console commands to enter Zombies maps without going through the Zombies menu. It's a somewhat convoluted process. More here.