The Crowbar is a meleeweapon. It is a unique weapon which deals critical hits right after destroying a door or hitting a specific "bestial" type enemy.
Details
Special Effects:
Upon destroying a door, the Crowbar will always deal critical damage for 8 seconds.
This includes the door spawned by the skill Emergency Door.
Hitting an unbreakable door will activate critical hits for this weapon.
Hitting certain enemies and bosses will also deal critical hits, these include:
The blueprint for the Crowbar is located in a secret area behind a special lore room where a scientist's corpse with a headcrab resides, along with that of the HEV Outfit. The room will always spawn unless both are collected and turned in to the collector.
Synergies
The Emergency Door can be used to guarantee critical hits with the Crowbar even when there are no doors available, such as in boss biomes. Since the skill has a 10s cooldown, without any cooldown decreasing mutations such as Instinct of the Master of Arms it leaves a 2 seconds window where the Crowbar won't deal critical hits before a new door can be deployed.
Trivia
Along with the HEV Outfit, the Crowbar is a reference to the Half-Life series as the iconic melee weapon used by the protagonist Gordon Freeman.
Before v1.8, this weapon was teased in the game as an easter egg in the background of Weapon Merchants.