Shows where to get a backpack on PC Doom II level 3, The Gantlet. This is the first place in the game (since v1.9) where you can find a backpack during the Single-player campaign.
It can be easy to overlook this item since it's well hidden, won't affect the player's Items score, and its location is not a score-affecting Secret area.
The backpack, and a pair of teleporters, can be accessed once a player crosses an invisible floor trigger that's located just in front of a switch.
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