Mass Effect 3 Walkthrough
This is my favorite guide on the Citadel. Our Mass Effect 3 Walkthrough covers the entire spectrum of the single player story, multiplayer tips, and how to build a powerful army.
N7: Cerberus Lab
This mission can be gained by talking to Traynor on your ship. The lab is located on Sanctum in the Decoris system. It starts easy enough by taking out a squad of Cerberus Assault Troopers and Centurions. Before grabbing the artifact you can also snag some credits, data pad worth XP, a sniper rifle scope, and Alien Medi-Gel Formula Artifact. The second wave is mostly rinse and repeat, but things will get much more hectic for the third.

Cortez will have to fly away for a short time, meaning you'll have to wait and hold ground until he comes back. Cerberus will unleash some of their more nasty soldiers: shielded troopers and engineers. Use whatever Biotics you have against the shield holders to make them vulnerable; also concentrate on the engineers first before destroying the turrets they can deploy. Most importantly be mindful of all the grenades that will be tossed around and roll away from them right way.

After about three or four more waves, Cortez will arrive again allowing you to escape. Back on the Normandy you'll be rewarded with Cerberus Research Data worth 50 War Assets.




