By now, we all know you can earn supply drops in multiplayer by playing and beating challenges to unlock rare gun combinations and gear for your soldier, but what you probably don’t know is that there are certain items you can only unlock by playing singleplayer.

While visiting Sledgehammer Games last week, Michael Condrey informed us that supply drops can be earned while playing the campaign, and these drops will include loot you can only find by playing singleplayer. So if you’re trying to unlock everything in multiplayer, you’ll have to get through the campaign too.