[QUOTE=Kyatric] @Harrio: You can use invert(is on screen) as Geo mentionned above.
You can also use "System: compare two values" and look for the distance between the player and the bullet. More than a certain distance, you consider that you have to delete the bullet.
Actually your event number 4 is better than number 3 because that number 3 isn't exactly get bullets destroyed out of the window, just a short range attack.
Anyways nice example!