Vertical Slices: Why They Mislead New Game Developers

“Game development is 90% falling into pits, and 10% climbing out and realizing you dug the pit yourself.” - Rami Ismail

That quote stings, right? It’s especially true for new developers lured by the deceptive allure of the vertical slice.

The Vertical Slice Lie

A vertical slice, that polished chunk of gameplay showcasing your game’s potential, is fantastic for securing funding or building hype. But it’s also a dangerous siren song. Many beginner game developers mistakenly believe that if they can build a compelling vertical slice in, say, three months, the entire game will only take a year. This assumption is almost always catastrophically wrong.

Why? Because the vertical slice focuses on depth, not breadth. You pour resources into making that one level, that one mechanic, shine. You optimize the hell out of it. But that’s not representative of the grueling process of scaling up.

The Hidden Costs of Scaling

Think about it. Your vertical slice likely has:

• Limited content: A few enemy types, one level, maybe a boss. Creating dozens more is exponentially harder than creating a few.
• Optimized code: Tailored to that specific slice. Generalizing that code for various situations introduces bugs and complexities.
• Hand-crafted assets: Each meticulously designed. You haven’t even thought about the pipeline for producing hundreds more.

The real challenge lies in replicating that quality, consistently, across the entire game. This is where the hidden costs explode. Content creation becomes a bottleneck. Bug fixing turns into a hydra. Your initial estimates become laughable.

Avoiding the Over-Scoping Trap

So, how do you avoid this trap? It starts with redefining your scope.

Focus on your MVP (Minimum Viable Product). What is the absolute bare minimum you need to demonstrate the core gameplay loop? Cut everything else. Seriously, be ruthless.

Instead of a polished level, aim for a functional level generator. Instead of five enemy types, focus on one with adaptable behavior. Prioritize systems over content.

This isn’t about making a bad game. It’s about making a realistic game.

Accurate Planning: Timeboxing and Iteration

Once you have a realistic MVP, start planning for full-scale production. Don’t rely on gut feelings. Implement these techniques:

• Timeboxing: Allocate a fixed amount of time to a specific feature. If you don’t finish it within that time, scale back the feature or cut it entirely.
• Iterative Development: Build in small, manageable chunks. Test frequently. Get feedback early. Adjust your plans based on reality, not wishful thinking.

Embrace the idea that your initial estimates will be wrong. The goal is to get less wrong with each iteration.

Track Your Time, Refine Your Estimates

Here’s the most crucial, and often overlooked, step: track your time.

How long did it actually take to create that enemy AI? How much time did you spend fixing bugs in the movement system?

Document everything. Every feature, every bug fix, every refactoring session. This data is invaluable for refining your future estimates.

Many developers think this is tedious. They’d rather be coding. But tracking your time is an investment in your future efficiency.

This is where a game development journal becomes your secret weapon. A dedicated journal helps you consistently track your progress, document challenges, and analyze your workflow.

Your Game Dev Journal: More Than Just a Log

A game dev journal isn’t just a glorified to-do list. It’s a record of your creative process. It’s a space to:

• Track development progress: Log tasks completed, bugs fixed, and features implemented.
• Analyze your workflow: Identify bottlenecks, wasted time, and inefficient processes.
• Refine estimation skills: Compare estimated time with actual time to improve future planning.
• Document design decisions: Explain your reasoning behind choices, for future reference.
• Maintain consistency: Regular journaling encourages consistent work habits.

Treat your journal like a science notebook, rigorously documenting your experiments and observations.

Common Pitfalls and How to Avoid Them

• Inconsistent logging: Sporadic entries are useless. Aim for daily or near-daily entries.
• Vague descriptions: “Worked on AI” is not helpful. Be specific about what you accomplished.
• Ignoring negative data: Don’t just log successes. Document failures and challenges to learn from them.
• Treating it as a chore: View journaling as an investment in your development skills, not a burden.

Level Up Your Game Dev: Start Journaling

The vertical slice is a great marketing tool, but a terrible planning tool. Don’t fall for the illusion of progress. Focus on building a realistic MVP, planning for full-scale production, and tracking your time religiously.

Start your game development journal today. It’s the best way to understand your development process, refine your estimation skills, and ultimately, ship a better game, on time.

Ready to get started? Try our journaling tool and take control of your game development journey. Start documenting your progress today!