Yeah, I liked the SP at first, but after you figure out the AI's weaknesses, it's pretty easy
Examples:
- Going through most of the game simply by turning invisible, grabbing a guy and throwing him at his friends. Then beating them to death before they get up (Instakill if you got strength mode, so you can skip this part) Then turn invisible again, and repeat.
- Turning invis, lining up a headshot, switching to armor mode, firing, going invis again, repeat.
For me, the enemies
extreme blindness to invisibility even at ridiculously close range was the games main flaw
