^ Title says all.

I recall reading somewhere that it was a method by spawning bipeds and weapons underneath them that only spawned on certain gametypes, which exploded.

So, for example:

Biped named CTF spawned. An Assault Rifle is placed at it's feet and is set to spawn only on the CTF gametype. When it does, it explodes, like the FRG in the H1 Campaign. The script detects when the CTF biped is dead, and so, determines which gametype it is. I believe it was used to change scenery around in Coldsnap.

^ that is true. but i think he wanted the actual script? lol..

Once you understand the concept, it's easy to write it.

(global boolean ctf false)

(global boolean race false)

(global boolean slayer false)

(global boolean oddball false)

(global boolean koth false)

(script startup detect_gametype
	(sleep 120)
	(if
		(= (unit_get_health ctf) 0)
		(begin
			(set ctf true)
		)
	)	
	(if
		(= (unit_get_health slayer) 0)
		(begin
			(set slayer true)
		)
	)	
	(if
		(= (unit_get_health koth) 0)
		(begin
			(set koth true)
		)
	)	
	(if
		(= (unit_get_health oddball) 0)
		(begin
			(set oddball true)
		)
	)	
	(if
		(and
			(= (unit_get_health oddball) 1)
			(= (unit_get_health ctf) 1)
			(= (unit_get_health slayer) 1)
			(= (unit_get_health koth) 1)
		)
		(begin
			(set race true)
		)
	)
)

Ok, thanks for the script. How would I go around making the weapons explode?

theres a flag in the weapons, "explodes when dropped".

I just riped it from Coldsnap, It's assault rifle test I think.