It's good, like a 2D Splinter Cell. I finished the game on masochist difficulty unarmed and still didn't get the achievement, presumably because a door slam counts as using a weapon.

-Pretty basic enemy AI. It occasionally bugged out, especially in the last level where some enemy patrols would just stop at a location at the bottom of the map and never move until you did something to get their attention. I also don't know why enemies consider a door that you opened as noteworthy when they don't react to a door that has been opened by an enemy.
They'll just look at a heap of unconscious bodies in a bathroom and walk up to investigate and join them 99% of the time,
-The eliminate all enemies maps are very boring unarmed since the optimal strategy is just doing the same thing over and over and reloading if there are three enemies instead of two. I guess they are probably fun if you are using weapons though.
-Even finishing the game unarmed, I still have absolutely no idea how the noise system works. I gave up on using the speaking function and just sprinted a few steps to attract enemies, I still don't know if this actually did something to attract them or if it was just the next step on their patrol route.

It's good, like a 2D Splinter Cell. I finished the game on masochist difficulty unarmed and still didn't get the achievement, presumably because a door slam counts as using a weapon. -Pretty basic enemy AI. It occasionally bugged out, especially in the last level where some enemy patrols would just stop at a location at the bottom of the map and never move until you did something to get their attention. I also don't know why enemies consider a door that you opened as noteworthy when they don't react to a door that has been opened by an enemy. They'll just look at a heap of unconscious bodies in a bathroom and walk up to investigate and join them 99% of the time, -The eliminate all enemies maps are very boring unarmed since the optimal strategy is just doing the same thing over and over and reloading if there are three enemies instead of two. I guess they are probably fun if you are using weapons though. -Even finishing the game unarmed, I still have absolutely no idea how the noise system works. I gave up on using the speaking function and just sprinted a few steps to attract enemies, I still don't know if this actually did something to attract them or if it was just the next step on their patrol route.