Abyss Grumpy Hank Quests Guide (March 2026) Complete Walkthrough

Welcome to the most comprehensive Grumpy Hank quests guide for Roblox Abyss! If you’re looking to complete one of the most rewarding questlines in the game, you’ve come to the right place. This guide will walk you through every step, from unlocking Grumpy Hank to completing all four of his challenging quests and earning that coveted Ancient Key.

Quest	Main Rewards	Difficulty	Time Required
Quest 1	$4,500, 10 Star Shards, Advanced Oxygen Pod	Easy	30-45 minutes
Quest 2	$8,750, 20 Star Shards, Advanced Oxygen Pods	Medium	1-2 hours
Quest 3	$10,500, 30 Star Shards, Speed Potions	Hard	2-3 hours
Quest 4	$14,500, 40 Star Shards, Ancient Key	Very Hard	3-4 hours

How to Unlock Grumpy Hank

Before you can start Grumpy Hank’s questline, you need to complete a crucial prerequisite: delivering a Burger to him. This isn’t as simple as it sounds, as the Burger can only be obtained by completing Marcus’s entire questline in Ancient Sands.

Marcus Questline Complete Guide

Marcus is located in the archaeological site at Ancient Sands and offers six progressively challenging quests. Here’s everything you need to know:

Marcus Quest 1:

• Catch 6 Pompano
• Catch 1 Sand-Mutated Fish
• Rewards: $1,000, 5 Star Shards, Small Oxygen Pod x1

Marcus Quest 2:

• Catch 6 Cod
• Catch 2 Sand-Mutated Fish
• Bring 1 Fish Bone
• Rewards: $1,600, 5 Star Shards, Small Oxygen Pods x2

Marcus Quest 3:

• Catch 3 Blackfin Tuna
• Catch 4 Cod
• Catch 5 Pompano
• Catch 1 Cactus-Mutated Fish
• Rewards: $2,450, 10 Star Shards, Basic Oxygen Pod x1, Cactus Geode x1

Marcus Quest 4:

• Catch 6 Blackfin Tuna
• Catch 6 Pompano
• Catch 3 Sand-Mutated Fish
• Bring 2 Fish Bones
• Crack 3 Cactus Geodes
• Find 10 Tier 1 Treasure Chests
• Rewards: $3,850, 10 Star Shards, Basic Oxygen Pods x2, Speed Potion x1

Marcus Quest 5:

• Catch 4 Grouper
• Catch 5 Blackfin Tuna
• Catch 6 Cod
• Catch 2 Fossil-Mutated Fish
• Find 2 Tier 2 Treasure Chests
• Rewards: $4,450, 15 Star Shards, Small Oxygen Pods x4, Drop Luck Potion x1

Marcus Quest 6:

• Catch 4 Scorpionfish
• Catch 5 Grouper
• Catch 6 Blackfin Tuna
• Catch 3 Cactus-Mutated Fish
• Catch 2 Fossil-Mutated Fish
• Bring 6 Fish Bones
• Crack 5 Cactus Geodes
• Rewards: $7,800, 15 Star Shards, Basic Oxygen Pods x4, XP Potion x1, Cactus Geode x1, Burger x1

Pro Tip: I recommend having at least the Boat Tube and Crossbow Gun before starting Marcus’s quests. You can buy the Boat Tube from Marcus himself and the Crossbow Gun from his shop once you progress far enough.

Grumpy Hank Location

Once you have the Burger from Marcus, head to Ancient Sands. Grumpy Hank is located in a house on the far southeast of Ancient Sands, southwest of Crazy Jeff’s Store. The entrance to his house can be entered through the front door, which conveniently pauses your Oxygen depletion while inside.

Navigation Tip: Swim all the way west from the Forbidden Dome down to the Ancient Sands area. You’ll need at least the Pufferfish Tube and some Oxygen Tanks to reach this location safely.

Complete Grumpy Hank Quest Walkthrough

Grumpy Hank’s Quest 1: The Beginning

Objectives:

• Catch 1 Scorpionfish
• Catch 2 Groupers
• Bring 3 Fish Bones

Best Equipment:

• Tube: Boat Tube
• Weapon: Air Rifle Gun

Detailed Strategy: The first quest introduces you to Grumpy Hank’s requirements. The Scorpionfish is poisonous and will cause you to lose Oxygen if you get too close, so maintain distance while catching. Groupers are relatively easy to find in Ancient Sands waters.

For Fish Bones, you’ll need to look for randomly-spawning treasure icons while reeling in fish. These treasures can either be Fish Bones or Cactus Geodes, and Fish Bones are found only in Ancient Sands.

Rewards:

• $4,500
• 10 Star Shards
• Advanced Oxygen Pod x1
• Speed Potion x1

Grumpy Hank’s Quest 2: The Challenge Increases

Objectives:

• Catch 2 Sharks
• Catch 5 Scorpionfish
• Catch 8 Blackfin Tuna
• Catch 2 Fossil-Mutated Fish
• Crack 7 Cactus Geodes

Best Equipment:

• Tube: Boat Tube
• Weapon: Wasted Gun

Detailed Strategy: This quest significantly ramps up the difficulty. Sharks are Hostile and will attack if you enter their range, so be prepared for combat. I recommend using the Wasted Gun from Crazy Jeff’s Shop for better damage output.

For mutated fish, use the Radar from Richard in Forgotten Dome ($450) to easily identify fish with mutations. Fossil-Mutated Fish can be any fish species with the Fossil mutation, which gives a 1.75x price multiplier.

Cactus Geodes are obtained from randomly-spawning treasure icons while fishing. Keep an eye out for these during your fishing sessions.

Rewards:

• $8,750
• 20 Star Shards
• Advanced Oxygen Pods x2
• Small Oxygen Pods x5
• Drop Luck Potion x1
• Cactus Geodes x2

Grumpy Hank’s Quest 3: The Mutation Master

Objectives:

• Catch 2 Cavefish
• Catch 3 Sharks
• Catch 6 Groupers
• Catch 6 Sand-Mutated Fish
• Catch 4 Cactus-Mutated Fish
• Bring 8 Fish Bones

Best Equipment:

• Tube: Boat Tube
• Weapon: Wasted Gun

Detailed Strategy: This quest focuses heavily on mutated fish. Remember that mutated fish can be different from the regular fish you’re tasked to catch – any fish species with the correct mutation counts toward your goal.

Mutation Guide:

• Sand Mutation: 1.25x multiplier, found in Ancient Sands
• Cactus Mutation: 1.45x multiplier, found in Ancient Sands

Use your Radar frequently to identify these mutations efficiently. Cavefish are typically found in deeper waters, so ensure you have sufficient Oxygen supply.

Rewards:

• $10,500
• 30 Star Shards
• Advanced Oxygen Pods x3
• Speed Potions x2
• Strength Potion x1
• Cactus Geodes x4

Grumpy Hank’s Quest 4: The Final Challenge

Objectives:

• Catch 1 Ancient Shark
• Catch 3 Cavefish
• Catch 4 Sharks
• Catch 6 Fossil-Mutated Fish
• Catch 8 Cactus-Mutated Fish
• Catch 12 Sand-Mutated Fish
• Bring 12 Fish Bones
• Crack 14 Cactus Geodes
• Find 9 Tier 2 Treasure Chests

Best Equipment:

• Tube: Oxy Tube
• Weapon: Magroot Gun

Detailed Strategy: This is the ultimate test of your Abyss skills. The Ancient Shark is extremely rare and perhaps the hardest requirement due to its scarcity. Keep your eyes peeled and be patient – this might take some time.

For the treasure chests, check our complete Ancient Sands map guide for exact locations. Tier 2 chests are scattered throughout Ancient Sands, with several located southeast of Grumpy Hank himself.

Mutation Farming Strategy: I recommend focusing on one mutation type at a time. Use your Radar to scan areas and specifically target the mutations you need. The Sand and Cactus mutations are more common in Ancient Sands, making this the ideal location for farming.

Rewards:

• $14,500
• 40 Star Shards
• Heavy Oxygen Pods x2
• XP Potions x2
• Strength Potion x1
• Ancient Key x1 (The main prize!)

Essential Tips and Strategies

Equipment Recommendations

For Beginners:

• Start with the Boat Tube (buy from Marcus)
• Get the Air Rifle Gun for basic fishing
• Purchase Radar from Richard ($450) – this is essential!

For Advanced Players:

• Upgrade to Oxy Tube for better Oxygen capacity
• Use Magroot Gun for maximum efficiency
• Consider the Crossbow Gun as a mid-tier option

Money-Making Strategy

Completing both Marcus and Grumpy Hank questlines nets you roughly $20,000-$25,000 from each NPC. This represents a massive leap from early-game payouts and can fund serious gear upgrades.

Check out our comprehensive money-making guide for more strategies to maximize your earnings in Abyss.

Mutation Farming Guide

Understanding the mutation system is crucial for Grumpy Hank’s quests. Here are the key mutations you’ll need:

Mutation	Multiplier	Location	Rarity
Sand	1.25x	Ancient Sands	Common
Cactus	1.45x	Ancient Sands	Uncommon
Fossil	1.75x	Ancient Sands	Rare

Pro Tip: Mutated fish can be any species – don’t limit yourself to specific fish types when hunting for mutations. Any fish with the right mutation counts toward your quest progress!

Common Mistakes to Avoid

1. Not buying Radar early – This tool is essential for finding mutated fish efficiently
2. Selling Fish Bones – Keep these for quest requirements
3. Ignoring Oxygen management – Always carry enough Oxygen Pods for deep dives
4. Skipping equipment upgrades – Better gear makes quest completion much faster
5. Not using the right tube – Boat Tube minimum for Ancient Sands exploration

Advanced Strategies

Speed Running Techniques

If you want to complete Grumpy Hank’s quests quickly:

1. Pre-fish common requirements before starting quests
2. Use multiple fishing sessions to maximize treasure spawns
3. Focus on one area at a time to reduce travel time
4. Keep a stockpile of common items like Fish Bones and Geodes

Resource Management

Oxygen Management:

• Always carry at least 3-4 Oxygen Pods for long sessions
• Use the house pause trick when visiting Grumpy Hank
• Consider Heavy Oxygen Pods for extended diving

Inventory Optimization:

• Sell fish immediately after catching to free up space
• Keep quest items separate from regular inventory
• Use the Bank feature if available for storing valuable items

Frequently Asked Questions

How do I get the Burger for Grumpy Hank?

You must complete all six of Marcus’s quests in Ancient Sands. The Burger is awarded as a reward for completing Marcus’s final quest.

Where is Grumpy Hank located?

Grumpy Hank is found in a house on the far southeast of Ancient Sands, southwest of Crazy Jeff’s Store. The house entrance pauses your Oxygen depletion.

What is the Ancient Key used for?

The Ancient Key is the final reward from Grumpy Hank’s Quest 4 and is used to unlock special areas or chests in the game.

How rare is the Ancient Shark?

The Ancient Shark is extremely rare and may take significant time to find. Patience and persistence are key – keep fishing in Ancient Sands and use your Radar to identify it.

Can I complete multiple quests at once?

Yes! Many quest requirements overlap. For example, Fish Bones and Cactus Geodes needed for Grumpy Hank can also be collected during Marcus’s quests.

What’s the best equipment for Grumpy Hank quests?

I recommend the Boat Tube minimum, with Wasted Gun or Magroot Gun for weapons. The Radar from Richard is essential for finding mutated fish efficiently.

How much money can I make from these quests?

Completing both Marcus and Grumpy Hank questlines nets approximately $40,000-50,000 total, plus valuable items and the Ancient Key.

Do I need to keep the fish after catching them for quests?

No! Once you catch a required fish, you can immediately sell it without losing quest progress. This helps manage inventory space.

Conclusion

Grumpy Hank’s questline represents one of the most challenging and rewarding experiences in Roblox Abyss. With proper preparation, the right equipment, and the strategies outlined in this guide, you’ll be well-equipped to tackle all four quests and earn that valuable Ancient Key.

Remember to take your time, especially with Quest 4 and the elusive Ancient Shark. The rewards are well worth the effort, providing substantial money, valuable items, and progression opportunities that will significantly enhance your Abyss experience.

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