this mod is difficult
That's why the player sometimes spawn with the machinegun to make it fair. If you were playing on hard/nightmare try normal, or try enslaving one or more strong monsters, the shambler for example.
About the bug, It's now partially fixed. Monsters check for water only when standing, walking, or running, but not when attacking, and some monsters have long attack animations, reducing air_finished and then making a gasp sound, but the sound is still there.
If that bug is the best ever, I'll ignore it and go back to the old code.
I made monsters to drown underwater without testing, I just figured out that when their health is 0 or less, they simply don't die. Just keeps drowning and becomes undamageable. That doesn't happen when they're on lava or slime. Zombies may gib into lava, they can drown too, but they won't die in any way.
