s400\soft\merce\fsm\EmSetArea0 (defines enemy spawns in the northern region of the map)
s400\soft\merce\fsm\EmSetArea1 (defines enemy spawns in the southern region of the map)
s400\soft\merce\fsm\fix\AtkRights (unknown)
s400\soft\merce\fsm\fix\BossEmSet (boss spawn info)
s400\soft\merce\fsm\fix\StartEmSet (spawn info about enemies who spawn right away)
s400\soft\merce\s400_em## (detailed enemy info)
s400\soft\merce\s400_fsm (spawn triggers, references the EmSetArea files)
s400\soft\merce\s400_IDF00_Ins (defines locations of explosive barrels and ladders)
s400\soft\merce\s400_IDF01_Ins (defines locations of chests, breakable boxes and time bonuses)
s400\soft\merce\s400_Item (defines items just lying around at start of match (combo bonuses in chests, herbs lying around, grenades lying around))
s400\soft\merce\s400_noitem (locations for where items never spawn?)
s400\soft\merce\s400_sce (unknown)