The "weak sales" quote was regarding new releases across all platforms -49 SKUs over 8 platforms32 SKUs over 7 platforms.*
We don't know exactly how many copies of Rome II they expected to sell, but we do know the number of units of new PC titles they expected to sell - 2,580,000, as reported as a full year forecast in the Full Year 2013 Results (page 21), Q1 2014 Results (page 15), Q2 2014 Results (page 17) and Q3 2014 Results (page 16). They actually achieved sales of 2,640,000 units. Rome II was also the only packaged title ever singled out for a positive comment during the year (Q2 2014 Results, page 16 - 'Overseas: Sales of "Total War: Rome II" are solid.'). The combined sales of Rome II, Football Manager and Company of Heroes 2 contributed 2,600,000 of those 2,640,000 units. So if Rome II significantly underperformed its sales target then that implies that one or both of Football Manager and Company of Heroes 2 must have significantly overperformed their sales targets. But if so, why weren't they singled out for comment?
*The original figures were erroneously taken from the FY2015 forecast rather than the FY2014 results.