The wind smells of salt and old beer; the lighthouse lamp hums above, and the keeper is missing his temper. I handed him spare change and felt the game shift from tutorial to a small, sharp mystery. One wrong move and I lost more than pride.
I’m going to walk you through the exact steps I used to catch the culprit for the Lighthouse Keeper in How to Fish, explain the gear that matters, and tell you who actually nicked the brew. You’ll finish faster if you follow the order and avoid the mistakes I learned the hard way.
Salt on the dock — How to complete Who stole my beer in How to Fish
Start at the keeper after the tutorial. The quest triggers when you speak to him, then he asks for help tracking down a missing beer.
Step 1: Buy a Beer Can for $12 (€11). Just buy a single can; you don’t need extras.

Step 2: Equip the Beer Can in your inventory and throw it to the Lighthouse Keeper. He’ll give you an Empty Beer Can back — that’s your lure. The empty can becomes a neon blinker in fog.

Step 3: Equip the Empty Beer Can as your lure and start fishing. This lure behaves differently from standard baits — it attracts the Spider Crab. When you hook one, the real test begins.

How do I get the Empty Beer Can?
Throw the purchased Beer Can at the Lighthouse Keeper. He swaps it for an empty can immediately. No mini-quests, no hidden currency — just a direct trade.
Who is the culprit in “Who stole my beer”?
The culprit is the Spider Crab. It’s attracted to the empty can and will bite when reeled. The Spider Crab is a pocket hurricane, small but capable of wrecking your run if you aren’t prepared.
The dock feels small when a crab is closing in — combat tips and what to bring
When you hook a Spider Crab, don’t try to win with bare hands. I punched one once and paid for it with a game-over that ate my cash.
Weapon choice matters. Bring a Knife if you can; it’s the most reliable tool for finishing the catch. Brass Knuckles help, but they’re second-best.
If you’re in a co-op lobby on Steam or playing with friends via Discord invites, the fight becomes easier — two players can split reeling and attacking. If you’re on Switch or PC through Steam, use the social features to call for backup.
After you kill the Spider Crab, take the carcass back to the Lighthouse Keeper and hand it over. That completes the quest and closes the loop.
Do I need a Knife to kill the Spider Crab?
Yes, you should have a Knife to reliably finish the Spider Crab. Brass Knuckles improve odds, but the Knife reduces risk of death and losing your in-game money.
If you want extra reading or community tips, check Moyens I/O’s screenshots and Steam threads, or ask on the How to Fish Discord — players share coop lobbies and timing strategies there.
Got a different strategy that makes the fight trivial — want to argue which weapon is truly superior?