This entity has been cut by Valve during the development of Half-Life and therefore is a leftover. It might function properly or not entirely or not at all.
Spawns a security card. This entity has no "game related behavior" besides storing in the player's inventory but its pickup ability is often used as a way to unlock other kinds of entities (by targeting a multisource which is the master of a door for example). In a deathmatch game, the item respawns 30 seconds after being collected.
Target (target) - Seemingly unused.
Delay before trigger (delay) - Seemingly unused.
KillTarget (killtarget) - Seemingly unused.
Name (targetname) - Name is a general attribute used to identify entities.
Pitch Yaw Roll (Y Z X) (angles) - Changes the rotational position of the item.
Not in Deathmatch (2048) - If enabled, the entity will not be present in a deathmatch game.
This item can be picked up without the suit.
There is no "limit" of how much the player can carry security cards.