Not hard by any means but the beginning can be a bit tricky if you aren’t good at taking cover. Several hitscanners (including three chaingunners) will walk towards you when you open the door, and there’s a shooting gallery room of shotgunners nearby who will fire when you step out. Stay in the room you started out in and you will be able to react to everything coming, but hide the second you hear a chaingunner fire. Chances are they might kill another enemy or two in front of them.
Once you survive this ambush, the rest of the map is easy enough. Between all of the ammo the hitscanners at the beginning drop, and the secret Super Shotgun behind the wall in the nukage pit, you’ll have more than enough ammo to clear the map. Just be mindful of the last room where there’s a few more chaingunners, including one who will teleport behind you.
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