How to Complete Cure for Isaac in The Forge (March 2026) Quick Guide

Updated by Dev Khurana
December 7, 2025
RobloxGaming

Are you struggling to find and complete the Cure for Isaac quest in The Forge? As someone who’s spent countless hours exploring every corner of this Roblox RPG, I can tell you that this early-game quest is an absolute goldmine for experience points that most players either miss or complete incorrectly.

In this comprehensive guide, I’ll walk you through everything you need to know about completing the Cure for Isaac quest efficiently. You’ll learn exactly where to find Isaac, what potion he actually needs (spoiler: it’s not what you think!), and how to maximize your rewards. This quest might seem simple on the surface, but getting it right the first time will save you time and give you a massive leveling boost early in your adventure.

Cure for Isaac Quest

Here’s everything you need to know at a glance:

Quest Detail	Information
Quest Name	Cure for Isaac
Required Level	Level 10
Location	Forgotten Kingdom Island
Key Item Needed	Health Potion I
Cost	$150 in-game currency
Main Reward	Large EXP boost + Badge
Combat Required	None
Quest Type	Optional side quest

Prerequisites & How to Start the Quest

Before you can even think about helping Isaac, there are two crucial requirements you must meet. I learned this the hard way when I first started playing and wasted hours trying to find Isaac before meeting these prerequisites.

1. Complete the Initial Tutorial

You must progress through the starting tutorial with Sensei Moro and receive the Portal from the Wizard. This Portal is absolutely essential for traveling between islands, and without it, you won’t be able to reach the Forgotten Kingdom where Isaac is located.

The tutorial quests are straightforward:

Follow Sensei Moro’s instructions
Learn basic mining and crafting mechanics
Complete the “End of the Beginning” quest
Visit the Wizard to receive your Portal

2. Reach EXP Level 10

This is a hard requirement that many players overlook. You cannot use the Portal to travel to the Forgotten Kingdom until your character reaches Level 10. Here are the fastest ways I’ve found to level up to 10:

Mine basic ores in the starting area (Copper, Iron, Tin)
Complete Sensei Moro’s quests for guaranteed EXP
Sell extra items to Marbles the merchant for small EXP gains
Fight weak enemies near the spawn area if you’re feeling brave

Pro tip: Don’t rush to Level 10 too quickly. Take some time to gather basic resources and get comfortable with the controls. The Forgotten Kingdom has tougher enemies, and you’ll want to be prepared.

Step-by-Step Quest Guide

Now that you’ve met the requirements, let’s dive into the actual quest walkthrough. I’ve broken this down into detailed steps to ensure you don’t miss anything.

Step 1: Travel to Forgotten Kingdom Island

Once you’re Level 10, open your map and use your Portal to travel to Forgotten Kingdom Island. This is the second major area in The Forge and where Isaac is located.

Important Note: The Forgotten Kingdom is significantly more dangerous than the starting area. While the Cure for Isaac quest itself doesn’t require combat, you’ll likely encounter stronger enemies just getting around. Stay on the main paths and avoid unnecessary fights if you’re under-geared.

Step 2: Find Isaac’s Location

This is where most players get stuck. Isaac isn’t in an obvious location, and his camp is easy to miss if you don’t know where to look. Follow these directions precisely:

Spawn at Forgotten Kingdom and head to the main shop area
Find Greedy Cay’s shop (the merchant who buys runes, essence, and ores)
Take a right turn from Greedy Cay’s stall
Follow the path as it curves upward and to the north
Turn left to head east when you reach the sign with the left arrow
Go through the large castle-style gate
Take another left turn before you reach the Wizard’s house
Follow the path up a slope heading south
Look for a small camp outside the Ruined Cave entrance

Isaac is in a tent on the northern side of this camp. You’ll also find Captain Rowan and several other homeless NPCs in this area. The camp has multiple tents and campfires, making it a distinctive landmark.

Pro Navigation Tip: If you get lost, look for the group of NPCs sitting around campfires away from the main merchant area. The path is straightforward once you know the route, but it’s easy to take a wrong turn in the Forgotten Kingdom’s winding paths.

Step 3: Understand Isaac’s Request

When you interact with Isaac, he’ll explain that he was injured by soulless creatures and needs a Health Potion I to recover. This seems simple enough, but here’s where many players make a critical mistake.

Isaac is very specific about what he needs: He wants Health Potion I, not Health Potion II or any other variation. If you try to give him the wrong potion, he’ll respond with something like “Is this a joke to you?” and refuse your help.

This is important because:

Health Potion I costs $150 and is available on Stonewake’s Cross
Health Potion II costs $350 and is available in the Forgotten Kingdom
Many players assume the more expensive potion is better and buy the wrong one

Step 4: Obtain the Correct Health Potion I

Here’s exactly how to get the right potion:

Use your Portal to return to Stonewake’s Cross Island (the starter island)
Locate Maria’s Potion Shop – it’s near the spawn area, close to Sensei Moro and the forging anvil
Purchase one Health Potion I for $150 in-game cash
Make sure you have enough money before traveling back to Isaac

Money Management Tip: Always keep at least $150 saved when you’re planning to complete this quest. There’s nothing more frustrating than finding Isaac, realizing you need a potion, and having to travel all the way back to farm more money.

Step 5: Deliver the Potion and Complete the Quest

This is the final and most satisfying step:

Return to Forgotten Kingdom Island via your Portal
Navigate back to Isaac’s campsite using the same route as before
Interact with Isaac again and hand over the Health Potion I
Watch the quest complete immediately with satisfying dialogue

Isaac will look much better after receiving the potion, and you’ll get your well-deserved rewards.

Quest Rewards and Benefits

Completing the Cure for Isaac quest provides several valuable benefits that make it worth your time:

Primary Rewards:

Large EXP (Experience Points) – This is the main reward and provides a significant leveling boost
Cure for Isaac Badge – A cosmetic achievement that shows in your profile
Early-game progression advantage – The levels gained help unlock new zones and gear faster

Why This Quest is So Valuable:

Fast Leveling: The EXP reward is disproportionately valuable for the minimal effort required. In my experience, this is one of the most efficient early-game leveling methods available.
No Combat Required: Unlike many other quests that give good EXP, this one involves absolutely no fighting. It’s perfectly safe for low-level players who might struggle with combat.
Unlocks Progression: The levels gained from this quest help you meet requirements for more challenging content, areas, and equipment much sooner than if you skipped it.
Teaches Important Game Mechanics: Completing this quest teaches you about Portal travel, NPC interactions, and the importance of reading quest dialogue carefully.

Common Mistakes to Avoid

After helping dozens of players complete this quest, I’ve noticed several common mistakes that can frustrate new players. Here’s what to watch out for:

1. Buying the Wrong Potion

This is by far the most common mistake. Players see that Health Potion II is available in the Forgotten Kingdom and assume it’s better. Isaac specifically wants Health Potion I, and he’ll reject anything else.

2. Not Being Level 10

You cannot access the Forgotten Kingdom until Level 10. Many players try to find Isaac early and get frustrated when they can’t reach the area.

3. Poor Money Management

Showing up to Isaac’s camp without enough money for the potion means a wasted trip. Always keep $150 on hand when you’re Level 10 or higher.

4. Getting Lost in the Forgotten Kingdom

The Forgotten Kingdom has winding paths and multiple areas. It’s easy to get sidetracked or lost trying to find Isaac’s camp. Stick to the main paths and follow the directions I provided earlier.

5. Skipping the Quest Entirely

Some players think this is just another boring fetch quest and skip it. Big mistake! The EXP reward is too good to pass up, especially early in the game.

Pro Tips for New Players

As someone who has completed this quest multiple times across different characters, here are some advanced tips that will make your experience even smoother:

Timing is Everything

Complete this quest as soon as you hit Level 10. Don’t wait around or put it off. The EXP boost will help you level faster and make the early game much more enjoyable.

Money Management Strategy

Always have a cash reserve of at least $150 after Level 10. This way, you can complete the quest immediately without needing to farm money first. I recommend selling extra ores and equipment to Marbles to build up your cash reserves.

Navigation Shortcuts

Learn the Portal system well. Being able to quickly travel between islands will save you tons of time, not just for this quest but for the entire game. The Portal is one of the most important tools you’ll receive.

Quest Optimization

Combine this quest with other activities. While you’re in the Forgotten Kingdom, take some time to explore, mine new ores, and potentially complete other quests. This maximizes your efficiency and reduces backtracking.

Future Planning

Use the EXP boost strategically. The levels from this quest might unlock new equipment, areas, or abilities. Plan your next moves based on what becomes available at your new level.

Platform-Specific Information

The Cure for Isaac quest works the same across all platforms where The Forge is available, but there are some platform-specific considerations:

PC Players

Use WASD for movement and make sure your Portal is easily accessible on your hotbar
Take screenshots of the route to Isaac’s camp for future reference
Consider using minimap mods if available to help with navigation

Mobile Players

Be extra careful with movement controls in the Forgotten Kingdom, as the paths can be narrow
Use pinch-to-zoom to get a better view of your surroundings
Consider using a stylus for more precise movement and interaction

Console Players

Map the Portal to an easily accessible button on your controller
Use the right stick to look around and get your bearings in the camp area
Take advantage of vibration feedback when interacting with NPCs

Frequently Asked Questions

What level do I need to be to start Cure for Isaac?

You need to be EXP Level 10 to use the Portal and travel to Forgotten Kingdom Island where Isaac is located. This is a hard requirement, and you cannot access the area before reaching this level.

Where is Isaac located in The Forge?

Isaac can be found on Forgotten Kingdom Island. From the main shop area (Greedy Cay’s), follow the path to the right until you find a campsite with several NPCs. Isaac is in a tent on the northern side of the camp, near the Ruined Cave entrance.

What does Isaac want from me?

Isaac requests 1 Health Potion I to help him recover from injuries he received in an attack by soulless creatures. He specifically wants Health Potion I, not Health Potion II or any other variation.

Where do I get a Health Potion I?

You can purchase Health Potion I from Maria’s Potion Shop on Stonewake’s Cross Island (the starter island) for $150. Maria’s shop is located near the spawn area, close to Sensei Moro and the forging anvil.

Is the Cure for Isaac quest required for the main story?

No, this is an optional side quest. However, it is highly recommended for the large EXP reward, which helps you level up quickly and unlock new zones and gear faster.

What rewards do I get for completing the quest?

You receive a substantial amount of Experience Points (EXP) and the Cure for Isaac badge. The EXP reward is the primary benefit and provides a significant leveling boost.

Is there any combat in this quest?

No, the Cure for Isaac quest is strictly a fetch mission with no combat required. This makes it very safe for early-game players who might struggle with fighting stronger enemies.

Why won’t Isaac accept the Health Potion II?

Isaac specifically requests Health Potion I and will reject Health Potion II with a response like “Is this a joke to you?” Make sure to buy the cheaper, less potent potion from Maria’s shop on Stonewake’s Cross.

How much money do I need for this quest?

You need exactly $150 to purchase the Health Potion I from Maria’s shop. It’s a good idea to keep this amount on hand once you reach Level 10 so you can complete the quest immediately.

Can I complete this quest multiple times?

No, the Cure for Isaac quest is a one-time completion quest per character. Once you’ve completed it and received the rewards, you cannot do it again on the same character.

Conclusion

The Cure for Isaac quest in The Forge is a perfect example of a low-risk, high-reward task that every new player should prioritize. By simply reaching Level 10, spending $150 on the correct potion, and making a quick delivery, you gain a massive EXP injection that propels your character forward in the early game.

From my extensive experience playing The Forge, I can confidently say that completing this quest early will make your entire gameplay experience smoother and more enjoyable. The levels you gain will unlock new equipment, areas, and opportunities that would otherwise take much longer to access.

Remember to:

Wait until Level 10 before attempting to find Isaac
Buy Health Potion I (not Health Potion II) from Maria’s shop
Follow the navigation directions carefully to avoid getting lost
Keep $150 on hand once you’re eligible to complete the quest

This quest might seem simple, but getting it right the first time will save you time and frustration while giving you a significant advantage in your Forge journey. Complete it, claim your experience, and use your new levels to tackle the stronger zombies and deeper mines that await in this fantastic Roblox RPG.