Death Cards are playing cards found throughout Call of Duty: World at War. They are attached to helmets and placed on top of vertical rifles, and are often found near fallen enemies who have not been killed during the level. Death Cards are similar to Call of Duty 4: Modern Warfare's and Call of Duty: Modern Warfare 2s Intelligence pieces. They each unlock a special ability in co-op play. They can only be used in private matches.
From StrategyWiki, the video game walkthrough and strategy guide wiki