as much as i love single player i mainly got it for mp and firstly it had many issues, and secondly single player seemed a bit easy, because i could just stealth my way around massive battles that are setup and not kill anyone.
mind you it was hell of alot of fun, and those pinger battles are just so hard for the first 4 times going through sp, so i have finishing it 5 times since the psn went down, and craving some multiplayer action. i wish they had bots or something to verse, would be pretty cool.