Crate Spy
From Worms Knowledge Base
(Up to Weapons)
Crate Spy, when enabled, allows a player to see what crates contain.
If a player collects it in a Utility crate, it lasts until the end of the round. Only the player that collects the Crate Spy will benefit and it takes effect immediately when it is collected.
The "Everything you wanted to know about the contents of a crate" mode enables Crate Spy for every player for the entire game.