Call of Duty: Modern Warfare 3 may be making a dramatic change in the series with Activision seemingly teasing this week the addition of Call of Duty’s Zombies mode in the new Modern Warfare game. The latest tease was discovered by Call of Duty players sending inquiring messages to the mysterious phone number that’s been feeding players bits of info in the past couple of days. Activision of course has not outright confirmed Zombies being in Modern Warfare 3, but the teaser is as good a confirmation as we can hope for until all (or most) about the game is revealed later this week. The number in question, in case you missed it, is 1-202-918-3022, and when you send it messages, you’ll sometimes get some clues about what’s coming in Modern Warfare 3. Most recently, players found that they could sent it “Zombies” or something very close to that and would get a response back that included an audio file that sounds a whole lot like the familiar growls from the undead in Call of Duty’s Zombies mode. Sometimes, people also get back a zombie emoji as a response which all but seals the deal regarding what this tease could mean.