But then you have to ask yourself why we are willing to pay MORE for an SP only game that we'll probably get less out of. Look at God of War. I love God of War. I'm more than willing to shell out $60 for God of War. However, it's a game I'll beat in one or two sittings. On the flip side, Team Fortress 2, Battlefield 2, and Unreal Tournament 3 are good example of MP only games (I do NOT count bots as SP) that, in your eyes, I should have to pay less money for.
Why? Why should we pay less money? Are these games worth less? Do they have any less quality? In a lot of cases, a company can spend just as much time making that MP game as the company that made the SP game. In fact, in most cases, they have to do a lot more work because MP games, in general, require a lot more patching than SP games. So I will gladly shell over that $20 for a game that can be equally as good, even though it's only MP. If Warhawk was $60, and $80 with the headset, then I would have been more than willing to give Incognito $80 for it.