The Eye-Opener is a Superior unique weapon featured in Dead Island 2 (2023).
Here you can find the main information about the weapon and where to find it.
How to get the Eye-Opener weapon in Dead Island 2:
To unlock the Eye-Opener in Dead Island 2 you need to purchase the Pulp Weapons Pack DLC, which is included in the Deluxe and Gold editions of Dead Island 2.
Once in the game, you can claim the Pulp Weapons Pack at the Trader, where you'll be able to buy the weapons for free.