Glass Knife

The Glass Knife is the second most powerful weapon when fully charged, comparable to the Fireaxe and bested only by the Sledgehammer. The Glass Knife is a shard of broken green glass fixed to the player's wrist by what seems to be a belt.

It can be found in the Waterways by a latex puddle or in the Engine Room in the back left corner.

Advantages

 * Second strongest weapon when charged fully.
 * Can be found relatively easily.
 * Better alternative of the Fireaxe in terms of jab damage, recharge speed and respawn time.

Disadvantages

 * Slow recovery time which leaves you vulnerable for attacks, as well as a small attack range.
 * The addition of the fireaxe could be deemed as a "safer" option to the glass knife, and may be favored.