Every SS game should have this by default.

please answer me

How do you make this mod can you explain for me ?
And do you want to port this into a fusion ?

I love this mod. Is there any chance you could recreate it for the other games in the series? I have a feeling it would be pretty fun in the last level of The Second Encounter.

1) Unfortunately, this is not preventable without actually editing each and every enemy classes' behaviour file, which would be tedious and would also interfere/not work with many other mods.

2) This is intended, it works just like it does in Doom.

Great mod, though I've noticed two minor flaws not yet mentioned:

1) The monsters seem to periodically check if Sam's around, or something to that effect; so even if a monster's current target isn't dead yet, he may suddenly turn on Sam regardless. However, apparently this can be prevented by keeping a sufficient distance from the infighting monsters, in which case they should battle to the death.

2) Also, the monsters don't seem to "keep a list" of those who have recently harmed them, so even if a monster is surrounded by a horde of other hostile monsters attacking him, he will always turn on Sam as soon as his current target dies (of course, in such a case he's likely to quickly take a hit from someone, and forget Sam).

Thank you for clariflying and recommending that, even though I won't use it. You answered my question: if it was easily possible.
Man I've been playing so much Sam with friends using this mod and it is awesome. When I play singleplayer I do exactly what I do in Doom 1 & 2, take my absolute sweet time like I'm Solid Snake and have every enemy I can kill each other. That way I can play on Nightmare mode and Serious mode here!

Yeah you're right, the zombies did turn on each other. Unfortunately, this can not easily be done here in SS3, because Characters of the same CharacterClass cannot damage each other - and that's why I prevented them from targeting each other.
If you REALLY don't care about enemies fighting each other fruitlessly until eternity, you could open the script and delete this from line 32:

and spawnee:GetCharacterClassFromParams() ~= damager:GetCharacterClassFromParams()

This is great and I subscribed the second I saw it. I especially love mods like these because it makes playing on Serious difficulty possible.
You said you emulated DOOM in that enemies won't turn on their own species, but actually all of the zombie types (rifle shotgun and chaingun) will all kill each other.
Would it be simple for you to make this game's zombies do the same?

YES! I love infighting, thx so much

nice

))))))))))))

Didn't Quake have infighting?

Hit that big green "Subscribe" button above

How can I get this mod?

I haven't tried it yet but I gotta thank you for creating this!

Shieeeet///(((

I was waiting for something like this, you're awesome :D

Pretty awesome, nice invoking nostalgia of older games that had infighting, I always thought Serious Sam was missing this since enemies can actually damage and even kill each other if you do it right.

да хороший мод

Хороший мод

Hahahaha, this is amusing! I always loved that infighting concept. AI gets pissed off at each other because of accidental clumsy shooting, and they just break out in a massive rage fight.

Awesome. I'm going to try this out ASAP.

Adding this to my load order with Seriously Doomed, as that mod doesn't seem to have infighting enabled.

so how dose this work