Valkyria Chronicles is one of my favorite games ever but there was this one mission where I wanted to break things. Basically, you had to guard the entrance to the map while still accomplishing your objective on the other side. If an enemy got past you, it was an auto-loss.
In order to prevent that, I would leave two players back in a position where they could cover one another. The problem was, when one enemy would run up, they would TURN TO FOLLOW THAT ENEMY BUT NEVER TURN BACK. ARGH. The guards you had set up perfectly would suddenly be facing the wrong way. That meant that the very next enemy could run right by them without ever being fired upon. Lame, lame, lame.
Also, any FPS that thinks it's clever by adding in platforming sections. Stop it.
