The graveyard of unfinished indie games is enormous. Developers start with brilliant ideas, spend months building systems, adding mechanics, expanding the world — and then quietly abandon the project somewhere around the halfway mark. It’s not a talent problem. It’s a scope problem.
Table of Contents
This guide gives you a concrete, step-by-step framework for defining exactly how big your first game should be before you write a single line of code, plus realistic timelines, how to fight scope creep once you’re mid-project, and the mistakes that sink most first attempts. Finishing one small, polished game is worth more than abandoning ten ambitious ones — the skills you build by completing a full development cycle can’t be learned any other way.
Quick Answer
Write your entire game in one sentence, then build only what proves that sentence is fun: one core mechanic, one environment, one progression loop. Use MoSCoW (Must-have, Should-have, Could-have, Won’t-have) to cut every feature that isn’t essential, target a small vertical slice before a full game, and tie your deadline to a real external event like a game jam. Most first-time solo developers should aim to ship in roughly 3 to 9 months of full-time work (or 9 to 18 months part-time) — if your plan reaches past a year, the scope is still too big.
Step-by-Step: How to Define the Right Scope Before You Build
Step 1 — Write your one-sentence pitch. Describe your game in a single sentence: what the player does, what makes it interesting, and how it should feel. ‘A 2D puzzle-platformer where you rewind time to solve environmental puzzles’ is a scope. ‘A massive RPG with crafting, diplomacy, and procedural quests’ is a wish list. That sentence becomes your scope filter — any feature that doesn’t directly serve it gets cut.
Step 2 — Prove your core mechanic is fun first. Put your earliest development effort into making one mechanic feel satisfying in isolation, with placeholder art and no music. ConcernedApe spent months tuning the feel of Stardew Valley’s farming and NPC-interaction loop before layering anything else on top. If the core mechanic isn’t fun on its own, more features won’t fix it.
Step 3 — Target a vertical slice, not a full game. Aim your first shipping milestone at one level or zone, one enemy or obstacle type, one progression ramp, built with real (not placeholder) assets. A vertical slice proves you can actually make the game, and a failed one is a cheap, fast lesson — far cheaper than discovering the same problem after a year of full production.
Step 4 — Apply MoSCoW to your full feature list. List every feature, mechanic, screen, and system you can imagine, then label each Must-have (the game cannot function without it), Should-have (important but workaroundable), Could-have (nice to have), or Won’t-have (out of scope for this version). Be brutal in the Must-have column — most first-time developers find their real list is a fraction of what they imagined.
Step 5 — Create a minimal Game Design Document as a scope contract. A two-page GDD covering your core loop, Must-have features, art direction, and target platform is enough. Treat it as a written agreement with yourself: when a tempting new feature idea shows up mid-development, check it against the GDD. If it’s not in the Must-have column, it goes in a ‘next game’ file.
Step 6 — Set a deadline anchored to a real external event, and track tasks daily. Abstract dates like ‘ship by Q3’ slip constantly; a game jam, local showcase, or festival submission window creates real accountability. Track every remaining task in a spreadsheet, Trello, or a tool built for game dev like Codecks, and aim to close at least one task a day — when you hit a blocker, switch to a different open task instead of stalling.
MVP vs. Vertical Slice — Know the Difference
These terms get used interchangeably, but they target very different things. An MVP (Minimum Viable Product) shows the whole game in rough form — every major system present, none of them polished. A vertical slice shows one small section built to final quality, demonstrating exactly what the finished game will look, sound, and play like across that slice.
For a first indie game, the vertical slice is almost always the better shipping target, because it forces you to answer the hardest question — does this actually feel good to play — before you’ve spent months building every system. Reach for an MVP instead only when you specifically need to demonstrate full game-loop breadth, such as pitching a publisher or investor who wants to see the whole product shape, not just polish on one section.
How Long Should Your First Indie Game Actually Take?
Timelines vary by genre, but as a rule, a solo developer working full-time can finish a small, polished 2D game — 10 to 15 levels, basic menus, simple sound — in roughly 3 to 9 months; part-time around a job, expect 9 to 18 months for the same scope. Simple puzzle or arcade-style games land at the shorter end; a platformer or top-down shooter with hand-built levels typically needs the full 3 to 6 months of full-time work to reach a shippable state.
Well-known solo projects illustrate why that range matters: Eric ‘ConcernedApe’ Barone spent about four years building Stardew Valley alone, and Toby Fox spent roughly three years on Undertale — both far larger in scope than a recommended first project. The lesson isn’t to expect those timelines; it’s that even experienced developers take years once scope grows past a vertical slice, and most first-time developers underestimate their own timeline by two to three times. If your honest full-time estimate for a first game runs past 12 months, treat that as a signal to cut scope, not push through — you can build the bigger version once you’ve shipped one full cycle. See our detailed breakdown of realistic indie game development timelines by genre for a closer comparison.
How to Handle Scope Creep Once Development Starts
Scope creep rarely arrives as one bad decision — it’s dozens of small ‘just one more thing’ additions that each feel reasonable in isolation. The fix isn’t willpower, it’s a process: keep a running ‘next game’ or stretch-goals file next to your GDD, and the instant a new feature idea appears, write it there instead of into the build. That single habit removes most scope creep at the source.
When an idea keeps nagging at you, run it through two filters before it’s allowed near the Must-have column: does it serve your one-sentence pitch, and can you ship without it? If the honest answer to either is no, it’s a Should-have, Could-have, or Won’t-have — not this version. Revisit your MoSCoW list every couple of weeks rather than only at the start, and if you’re working with even one collaborator, say the cut out loud so the idea doesn’t quietly resurface a few sprints later.
Common Scoping Mistakes (and What to Do Instead)
Building systems before proving the core mechanic is fun. Inventory, crafting, and dialogue systems feel like progress, but if the core loop isn’t engaging with placeholder art, no amount of surrounding systems fixes that. Prototype the core mechanic first, alone, before building anything else.
Letting art scope grow unchecked, and benchmarking against games you can’t finish. Art is usually the slowest part of solo development — lock your style early and keep the asset list as short as your Must-have list. Comparing your first project to a small studio’s third shipped game (or a AAA title) sets an impossible bar; scope against your own available hours and experience, not the games you grew up playing.
Skipping the deadline because ‘it’s just a personal project.’ Without an external deadline, development expands to fill whatever time is available. Even a self-imposed date loses to a real one — submitting to a game jam or festival creates accountability a calendar reminder never will.
indie game scoping FAQs
How long should my first indie game take to make?
For a solo developer working full-time, budget 3 to 9 months for a small, polished 2D game; part-time, expect 9 to 18 months for the same scope. If your honest estimate runs past a year, cut scope rather than extend the timeline.
What if I get a great feature idea in the middle of development?
Write it down in a separate ‘next game’ or stretch-goals file immediately, then keep building the current scope. Compare it against your GDD’s Must-have list — if it’s not there, it waits for the next project, not this one.
How do I know if my scope is still too big after I’ve cut it down?
If your vertical slice — one level, one enemy type, one progression ramp — is taking more than two or three months of full-time work to reach playable quality, the scope is still too big and needs another pass of MoSCoW cuts.
Should I use a game jam for my first indie game?
Yes, for most first-time developers a game jam is one of the fastest ways to learn scoping. It imposes a hard, real deadline, forces a small scope by definition, and comes with a built-in audience of players on itch.io when you release.
What is the difference between a vertical slice and an MVP in game development?
An MVP shows every major system in rough, unpolished form across the whole game. A vertical slice shows one small section — one level, one loop — built to final quality. For a first solo game, the vertical slice is the more useful target because it proves the game feels good before you commit to building everything else.
What should a minimal Game Design Document include for a first game?
A one- to two-page GDD is enough: your one-sentence pitch, your core gameplay loop, your Must-have feature list from the MoSCoW pass, your art style direction, and your target platform. Treat it as a scope contract you check new ideas against.
How many mechanics should a first indie game have?
One. A first game built around a single, well-tuned core mechanic that’s expanded through level and encounter design — not new systems — is far more likely to ship than one juggling three or four mechanics at once.
Build It With GTStudios
Need help with your website, app, or small-business tech? GTStudios builds web, apps, and software for small businesses. See how GTStudios can help.