Reupload of Cooperative Combat made by Rangelost and reworked by Rezeth

In the original game, creatures become invulnerable for 0.5 seconds when attacked. Because of this, if multiple players attack the same target, then most of the hits do not deal any damage.

With this mod, non-player creatures only become invulnerable for 0.5 seconds against the player who attacked them. This allows multiple players to attack the same target at the same time.