Wrath Of Heaven is the best attack in the game, but it will drop you down to one life point within mere seconds of its attempt. Pause game play in mid-attack and enable the "Recover health" code. By doing this, if your opponent swings his sword at you in mid attack, you will not die. Also, if you do not have any smoke bombs, just knock an enemy down and immediately perform Wrath Of Heaven. If timed correctly, it will hit him just as he stands.

Have the blow dart equipped and sneak up near an enemy. Aim the blow dart at the opponents head and fire. If you hit them in the head, it will be an instant kill. This is helpful when encountering the ogre in level 3.