X-10 is an X variant of A-10, being much more difficult and dangerous compared to the former. It has a small chance of replacing A-10, with those chances getting higher the more A-10 spawns in,
X-10, alike to A-10, spawns at the end of the map and moves in a straight line until it encounters a door, in which it will despawn. However, unlike A-10, X-10 expresses much faster speed, as well as a quieter sound effect, meaning it is difficult to determine its location, as well as avoid it.