How to Fish's Pufferfish boss is a brutal difficulty spike that demands a $650 SMG

The Pufferfish boss in How to Fish is not just a tough fight; it is a major difficulty spike that PC Gamer's guide says took multiple tries in both solo and co-op saves. The recommended loadout is the SMG, which costs $650, plus as many bullet upgrades as you can afford. The guide is blunt: do not stop to shoot the Pufferfish. Keep running and gunning until it is dead. That single piece of advice is the difference between a quick fillet and a respawn screen.

The fight is the third boss on the third island, following the Spider Crab and Giant Piranha, which lucky players can sometimes skirt by. To even reach the Pufferfish, you need to speak to the swimmer in yellow floaties, who asks for help slaying a scary fish. He won't hand over the bait until you find an endangered creature and feed it to him. That gets you the Carrot Bait, which you use to reel in the boss. The quest chain itself is a small tutorial in patience, a theme that carries straight into the boss fight.

The strategy hinges on movement and terrain. The guide advises eating enough seafood to top off health and hunger, then using trees as cover while keeping distance. The Pufferfish grows in size as you hit it, which makes dodging harder, but the guide found it easier to watch and dodge when it lost a little under half its HP. The purple poison is lethal fast, so avoid running into it. Every second of the fight is a test of positioning, not just aim.

One clever tactic is luring the Pufferfish around the merchant's shop, because it sometimes gets stuck cutting corners when it is bigger. That gives you rare moments to stand still and shoot. The guide stresses that the previous two bosses can be beaten without mastering terrain, but the Pufferfish forces you to learn it. That is a classic difficulty spike: a sudden jump in required skill that separates casual players from committed ones. It is the moment the game stops holding your hand.

For game designers, difficulty spikes are a double-edged sword. They can create memorable moments and a sense of accomplishment, but they also risk player churn if the spike feels unfair. The guide's existence is evidence that the community needs strategy content, which is a signal that the fight is challenging but not impossible. The $650 SMG cost also forces a resource decision, extending playtime as players grind for currency. That is a deliberate pacing choice, common in indie games that want to stretch a modest amount of content.

The economic design here is worth noting. The guide also recommends buying a new Fishing Rod for $3 and a Standard Lure for $15, small costs that gate the endangered creature hunt. The SMG, by contrast, is a major investment. This creates a natural progression: players must decide whether to spend on upgrades or save for the boss fight. It is a common mechanic to encourage exploration and side quests, which in turn makes the world feel denser than it is. The Pufferfish is the payoff for that preparation.

For players, the takeaway is patience and movement. For studios, the takeaway is that difficulty spikes need to be telegraphed and rewarded. The Pufferfish fight teaches a core skill that pays off later, which is why the guide frames it as a necessary lesson. If a boss feels impossible, players will look for guides, and if the guide works, they will stay engaged. That is the quiet economics of game design: a well-tuned spike can turn frustration into loyalty, and a poorly tuned one can send players to the refund queue.