If the player picks up a subsequent backpack, only the extra ammunition is collected. A backpack can be picked up even when the player cannot carry any more ammo of any type.
Using the cheat code idkfa or idfa to give the player all weapons and maximum ammunition does not give the player a backpack (although some source ports change this behavior). The backpack is the only powerup which does not have a corresponding idbehold cheat code.
Backpacks are not included in the items percentage displayed at the end of each level.
|Thing type||8 (decimal), 8 (hex)|
|Appears in||Shareware Doom|
The Ultimate Doom
|The Ultimate Doom||28||28||28|
|Doom II: Hell on Earth||48||48||48|
|The Plutonia Experiment||33||33||33|
|Items from classic Doom games|
Keycard • Skull key