User blog comment:Traditionalfire/Mass Effect: Modern Battlefield 27/@comment-24174486-20120812224954/@comment-24174486-20120813004908

The Galatic Readiness will stay at 50% without multiplayer. There are enough War Assets in the game without multiplayer to get the best endings at 50% Galatic Readiness (you need 3100 EMS for all of the best endings post-EC; according to this Wiki, the highest possible attainable EMS is 7700, half of which is 3850).