The Developer’s Checklist for Fixing Broken Game Core Loops

Posted by Gemma Ellison

July 29, 2025

The Developer’s Checklist for Fixing Broken Game Core Loops

Imagine this: It’s six months ago. You’re staring at your game dev journal, specifically the entry outlining your game’s core loop: Explore -> Gather -> Craft -> Upgrade. It seemed so elegant on paper. Now, with your first 10 playtesters in the rearview mirror, those journal entries scream “naive optimism.” You poured your heart into this game, but playtester #3 just spent 15 minutes wandering aimlessly, completely missing the “Gather” phase. Playtester #7 rage-quit after failing the “Craft” sequence three times in a row. What went wrong?

Your core loop, the beating heart of your game, is broken. But don’t panic. The feedback from those initial playtesters is invaluable, even if it stings. This is your chance to diagnose the problem and iterate towards a truly engaging experience. Ignoring this early feedback is a common pitfall, leading to wasted development time and a frustrating experience for future players.

Here’s a developer’s checklist to help you diagnose and fix your broken core loop, using the power of playtest data and your development journal.

Defining Your Intended Core Loop: Beyond the Paper Design

Before diving into the data, revisit your original vision. What should players be doing, and in what order? Write it down in your game dev journal. Be specific. For example, instead of “Explore,” try “Explore the Forest Region to discover rare resource nodes.” This detailed definition will serve as your baseline.

Common Pitfall: Vague Core Loop Definitions. If your core loop is too abstract, you won’t be able to accurately identify where players are deviating.

Observing Player Behavior: Watch, Don’t Tell (Initially)

During playtests, your primary role is observer. Resist the urge to coach or offer hints, especially during the first few attempts. Record everything in your journal:

Where do players get stuck?
What actions do they repeat?
What areas do they avoid?
What do they seem to be enjoying (or not enjoying)?

Pay attention to their facial expressions and body language. These non-verbal cues can reveal frustration or engagement that spoken feedback might miss.

Common Pitfall: Misinterpreting Player Behavior. A player who seems confused might not be stupid; they might just be missing a crucial piece of information. Avoid making assumptions about player intent.

Soliciting Targeted Feedback: Ask the Right Questions

After observing, it’s time to gather feedback. But avoid broad questions like "Did you like the game?". Instead, ask targeted questions related to specific stages of your core loop:

“On a scale of 1 to 5, how clear was the objective in the Forest Region?”
“What was the most confusing part of the crafting process?”
“Did you feel rewarded after upgrading your weapon?”
“Did you feel compelled to Explore further into the game world?”

Record their answers, verbatim, in your journal. The nuances of their language can be incredibly insightful.

Common Pitfall: Leading Questions. Avoid phrasing questions in a way that suggests a desired answer. “Didn’t you think the crafting was intuitive?” is a leading question.

Analyzing Playtest Data: Find the Breakpoints

Now, the real work begins. Using your journal, compile and analyze the data from all 10 playtesters. Look for patterns:

Which stage of the core loop consistently causes problems?
What specific elements are players struggling with?
Are there any unexpected behaviors or strategies emerging?

Quantify the data whenever possible. For example, “7 out of 10 players failed the ‘Craft’ sequence on their first attempt.” This provides concrete evidence to support your observations.

Common Pitfall: Confirmation Bias. Don’t cherry-pick data to support your preconceived notions. Be honest about the flaws in your game.

Iterating Based on Data: Targeted Fixes, Focused Playtests

Based on your analysis, identify the most critical breakpoints in your core loop and implement targeted fixes. Don’t try to overhaul everything at once. Focus on addressing the most pressing issues first.

After implementing your fixes, conduct another round of focused playtests, specifically targeting the areas you’ve modified. Did the changes improve the player experience? Did they create any new problems? Document everything in your journal.

Common Pitfall: Scope Creep. Resist the urge to add new features or mechanics while fixing your core loop. Focus on refining what you already have.

Example: Fixing the “Craft” Stage

Let’s say your data reveals that players are struggling with the “Craft” stage because the recipe requirements are unclear. Your fix might involve adding a more detailed tutorial or improving the visual clarity of the crafting interface. After implementing these changes, you would conduct another round of playtests, focusing specifically on the “Craft” stage, to see if the issue has been resolved.

Using Your Game Dev Journal to Track Everything

Your game dev journal is more than just a notebook. It’s your central repository for all playtest data, observations, feedback, and iterative changes. Consistency is key. Make it a habit to record your thoughts and findings after each playtest session. This creates a valuable historical record that you can refer to throughout the development process.

Consider using a dedicated tool to track your progress and organize your insights. Game development is a complex process, and it’s easy to lose track of details.

That’s why we built a journaling tool specifically for game developers. You can use it to track playtest insights, document your design decisions, and stay consistent with your devlogs. This organized approach can save you time and help you make better decisions. Start tracking your journey today!