This is a tutorial on how to create a death barrier in Call of Duty: World at War custom zombies.
You may want this feature in your map as part of a quest, or to just bully the players.
1) Right click on your 2D window in Radiant. Hover your mouse over 'trigger' and a menu should appear. Click 'hurt'.
2) You can resize this trigger to be any size of your choice. Press N on your keyboard to open the Entity window (this is where you insert your KVPs, for any new mappers). Type in the key 'dmg' (short for damage) and set the value as a number higher than 100.
IMPORTANT! If you do not have Jugg on your map, then you can set the value as 100 or 150. If you do have Jugg on your map, then setting the value under 150 will not kill the player. It needs to be over 250.
That's it. There are no further things needed in Radiant or in scripts. Just compile your map and it will work.