It's not time for Leviathan just yet, but there's still a reason to play some Mass Effect 3 this weekend. BioWare announced this weekend's multiplayer challenge, Operation: ALLOY, will launch tomorrow and last until Sunday.

The multiplayer challenge asks individual players to promote two multiplayer characters into their single player campaign. The Alliance's goal for the weekend is to get 50,000 characters promoted in total, so you've got your work cut out for you, private.

All players who attain the individual goal of promoting two characters will be awarded commendation packs, and if the Alliance reaches its 50,000-promoted goal, all players will be awarded a commendation pack and a medi-gel capacity increase.

This training exercise should prepare you quite nicely for Tuesday's release of ME3's single player downloadable content, Leviathan.