Is online really a must ?

[Dreddz]

Anyway, AI is a poor substitute for even a decent human opponent. And when I say a poor substitute, I mean AI is usually dumb as a brick and couldn't out think somone who's reasonably skilled on a bad day. The only way AI typically gets harder is by making them harder to kill/up accuracy until every shot is a headshot/you get the picture.

Thats just not true, nowadays we've got some pretty technical stuff going on in our AI's mind. The AI in todays games may not be ultra realistic, but only because it doesnt make dumb mistakes that we humans do. Thats what makes it so great.