This is what they meant by single player replayability!
"Replayability is a focus. Every single-player level has three difficulty settings (Recruit, Veteran and Elite) and four contract types, three of which (Precision, Covert and Demolition) are unlocked when you complete a Basic run-through. All require different tactics and afford different awards. Assuming it’s as good as it should be, you could be playing Mercenary for a long time."







