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Start with a finish line, not a feature list
Solo projects usually become unfinishable because the developer measures progress by ideas added instead of by a complete experience delivered. A world can have more regions, systems, characters and modes indefinitely. Your release needs a boundary that can be tested.
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Write the player promise in one sentence
Describe what the player repeatedly does and why it is satisfying. Keep the sentence about the experience, not the technology or the size of the world. For example: “The player climbs a dangerous island, learns movement shortcuts, and reaches a viewpoint that changes how the island is understood.” That sentence gives you a reference for every later decision. If a proposed feature does not strengthen the activity or its payoff, it is not part of the first release by default.
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Use a verb, a source of tension or choice, and a payoff. “Explore a city” is too broad to guide production. “Track a suspect through a compact city, choosing which clues to follow before the trail goes cold” is specific enough to expose the systems and content the game actually needs.
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Define the minimum complete release
Translate the promise into a beginning-to-end journey. The minimum release should include:
- An opening that teaches the player the essential interaction.
- A repeatable core loop that works without manual explanation.
- Enough variation, challenge or discovery to make repeating that loop meaningful.
- An ending or other unmistakable stopping point.
- Only the interface, save behavior, audio, art and technical support needed for that journey to be understandable and playable.
Write this as a short release statement. “A player can start a new game, learn the climbing controls, cross three connected areas using those controls, overcome one final route, see the ending, and restart without a broken save” is a boundary. “A tiny open-world adventure with lots to discover” is not.
Keep ideas that do not fit the statement in a separate backlog. They are not rejected forever; they are excluded from the current promise. This distinction lets you protect the release without pretending that the ideas have no value.
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Before building a large content set, identify what must be true for the promise to work. It may be the feel of movement, the readability of a puzzle, the emotional effect of a dialogue structure, the reliability of procedural generation, or the amount of content needed before repetition becomes tiring.
Choose one risk, not a miniature final game
Write the risk as a falsifiable statement: “Players can understand the route choice within 30 seconds,” or “Combining these two abilities creates decisions rather than a single dominant tactic.” Build only what is needed to test that statement. Temporary art and a single room are acceptable when the question is about interaction. A polished menu is not evidence that the core mechanic works.
- List the three assumptions that would be most expensive to discover late.
- Rank them by how completely a failure would invalidate the current promise.
- Make a small playable test for the top assumption.
- Put it in front of the intended kind of player and watch where they hesitate, exploit or disengage.
- Record what the test changed. Revise the promise or mechanic before expanding content.
Use the prototype to decide, not to justify expansion
A prototype is successful when it gives you a clear decision. If the interaction is promising but confusing, simplify it and test again. If it is not enjoyable after reasonable iteration, replace it before you commission art, write a campaign or design a progression tree. Do not treat a working prototype as proof that every adjacent idea belongs in the release.
GDC’s listing for Adam Robinson-Yu’s A Short Hike postmortem describes a major project being put on the back burner while a new prototype became the shipped game. GDC characterizes the result as small in scope and scale and says its initial release came together within a four-month deadline. That is a useful example of allowing a focused prototype to become the project; it is not a general schedule for solo development.
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Turn the release statement into production work
Once the smallest complete experience is clear, convert it into deliverables that another person could verify. Avoid milestones such as “make the game fun” or “finish the world.” Name the player-visible result and the conditions for accepting it.
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Create must-have deliverables
Typical categories include:
- Core interaction: movement, combat, construction, conversation or whatever action carries the promise.
- Learning: the first encounter that teaches controls and rules without outside explanation.
- Progression: the minimum sequence of challenges or discoveries that creates a beginning, middle and end.
- Content: the specific rooms, encounters, characters, items or levels required by that sequence.
- Presentation: readable feedback, essential audio cues, menus and settings needed to understand the game.
- Reliability: loading, saving, restarting and completing the release path without a known release-blocking failure.
Everything else is a stretch goal until these deliverables have acceptance evidence.
Write acceptance criteria before implementation
For each deliverable, state what you will observe in a build. “The final route is implemented” is weaker than “A new player can reach the final route, understand its objective, complete it, and trigger the ending from a clean save.” Criteria prevent a feature from expanding while you are working on it.
| Deliverable | Acceptance evidence | Common scope trap |
|---|---|---|
| Core movement | A first-time player can learn, control and recover from the move in a test room. | Adding advanced movement variants before the basic move is readable. |
| Progression path | The player can complete the required sequence from a new save to the ending. | Adding optional branches that require new art, writing and testing. |
| Challenge set | Each required challenge tests a known rule and has a clear success state. | Increasing quantity instead of fixing repetition or unclear feedback. |
| Save and restart | Progress survives a close-and-reopen cycle and a failed attempt can be restarted. | Supporting multiple complex profiles before one reliable path exists. |
| Release build | A clean install reaches the ending with no known critical blocker. | Continuing to add polish while launch-critical defects remain. |
Order work by dependency and risk
Build a vertical slice early: one short section containing the real interaction, representative feedback and a small piece of progression. It reveals whether art, code, level design and UI can work together. After that, expand only the parts needed to complete the release statement. A content list that is independent of a playable path hides integration work until late.
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Use a backlog and a feature-admission rule
New ideas are inevitable. The problem is accepting them immediately, while the cost and dependencies are still invisible. A backlog gives each idea a safe holding place and lets you evaluate it at a deliberate review point.
Capture ideas without interrupting work
For each idea, record:
- The player problem or promise it addresses.
- The smallest version that could test its value.
- Estimated implementation, content and testing effort.
- Dependencies it creates or removes.
- What existing release work would move if you accepted it.
- Whether it can be removed later without breaking saves, levels or the ending.
Do not polish the backlog into a second design project. A sentence and a rough effort category are enough until a review makes the idea relevant.
Score additions against the release goal
At a weekly or milestone review, score each candidate consistently. A simple five-question gate works:
- Does it directly improve the central player promise?
- Can the remaining time and skills support implementation, content and testing?
- What new technical or production risk does it introduce?
- Can you remove or defer it without breaking the complete experience?
- Which release-critical item will move to make room?
Accept an addition only when the answers are explicit and the replacement is visible. “It would be cool” is a reason to save an idea, not a reason to change the plan.
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| Decision | Use when | Required action |
|---|---|---|
| Accept | It strengthens the promise, fits the remaining capacity and has manageable dependencies. | Add it to a named milestone and remove or delay work of comparable cost. |
| Simplify | The value is clear but the full version is too risky or expensive. | Define a narrow version with its own acceptance test. |
| Defer | It may help, but the release can stand without it. | Keep it in the backlog with a review date or release condition. |
| Cut | It does not serve the promise, duplicates another system or threatens the release bar. | Remove its tasks and document the decision so it does not return by accident. |
Make cut points part of the calendar
Choose review points before you need them: after the prototype, after the vertical slice, when the required content is playable, and before polish. At each point, compare remaining work with the release statement. If the path is too long, cut or simplify then, while the cost of change is still lower. A late cut is not a personal failure; it is production control.
Handle changing resources without losing control
Scope can legitimately change when your available resources change. More funding, a collaborator, a new platform requirement or a longer committed schedule may allow a larger release. The change still needs a new boundary and acceptance criteria.
Re-plan when capacity changes
Document what changed, what additional capacity it creates, and which new deliverables are now affordable. Re-estimate integration and testing, not just feature implementation. Keep the original release path intact so the project still has a shippable core if the new resource disappears.
GDC’s listing for Gwen Frey’s Kine postmortem describes iterative development and scope increasing as funding arrived. The example shows that expansion can be deliberate when resources change; it does not show that every addition is beneficial or that a solo developer should expand whenever an idea appears.
Do not let sunk work dictate future scope
A partially built system is not automatically a reason to finish it. Ask whether it improves the release promise enough to justify its remaining cost, maintenance and testing. If not, remove it, hide it behind a development flag, or preserve only the reusable part. Time already spent cannot make the remaining work free.
Protect the project from hidden parallel work
Solo developers often lose weeks to work that is individually reasonable but collectively unfinished: several mechanics, multiple platforms, a marketing site, a second prototype and a large content pipeline all progressing at once.
Limit work in progress
Keep one primary task active and one clearly defined next task. Finish integration before opening another system. If a task is blocked, record the blocker and choose the smallest unblocker; do not start an unrelated feature simply because it is more enjoyable.
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Reserve explicit time for code, content, testing and administrative work instead of pretending they do not compete. A feature is not complete when its code works in isolation; it is complete when the player can encounter it in the release path, understand it and recover from failure.
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Set a platform boundary
Every additional platform adds build, input, performance, certification and support work. Choose the first platform that lets you test and ship the promise. Record later platforms as separate releases unless they are required for the initial audience.
Define “done” and freeze the release bar
“Done” should describe a playable outcome, not the feeling that no more improvements are possible. Your release bar can be written as a checklist:
- The complete core loop works from a clean start.
- Required content is present in the intended order.
- The ending is reachable and clearly signals completion.
- Critical crashes, blockers, progression breaks and save failures are fixed or have an explicit release decision.
- Controls, objectives and essential feedback are understandable without developer intervention.
- Optional polish is separated from issues that prevent completion.
When the bar is met, stop admitting new features. Use the remaining time for defects and narrowly defined polish. A polish freeze protects testing: changing systems while testing them invalidates your own results.
Classify defects by release impact
Use a small set of categories:
- Blocker: prevents starting, progressing or finishing; fix before release.
- Critical: corrupts saves, causes repeatable crashes or makes a required interaction unusable; fix or remove the affected feature.
- Major: degrades a required path but has a documented workaround; decide explicitly whether to fix, simplify or postpone release.
- Minor or polish: cosmetic or convenience work that does not prevent completion; schedule only after the required path is stable.
Test from a fresh save, a partially completed save and a failed attempt. Those states expose different progression and recovery failures.
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A Short Hike: let a focused prototype become the release
The GDC postmortem listing says Adam Robinson-Yu set aside a major project, developed a new prototype and brought the resulting small-scale game together within a four-month deadline. The lesson is about ambition and commitment: a compact idea can become the main project when it proves more viable than the larger plan. The timeline is a case study under particular circumstances, not a promise that a solo game can generally be completed in four months.
Kine: resource changes can justify deliberate expansion
GDC’s listing for Gwen Frey’s postmortem describes iterative development and scope increasing as funding arrived. Treat this as a model for re-planning when capacity changes, not as permission to add features without removing other work. The release statement still needs to be rewritten and protected.
Scope-management talks: a warning about late decisions
GDC’s 2022 session listing for Blazej Zywiczynski frames scope growth and late cuts as production-management problems and presents a method for revising scope. The listing does not provide enough detail to reproduce that method, so use it as a reminder to make scope decisions early and visibly rather than as a step-by-step formula.
Historical statistics need their sample attached
A February 2011 Game Developer magazine compilation reported that 17 postmortems, or 71 percent, reported scope problems. The magazine described inadequate time or resources, or designs that required repeated cuts. This was a selected historical set of postmortems, not a current estimate for solo developers. It supports taking scope risk seriously, but it cannot predict your project’s outcome.
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Antipattern research identifies candidates, not prevalence
The abstract of Video Game Project Management Anti-patterns says its authors mapped game-development project-management antipatterns to software-engineering literature. Feature creep, feature cuts, work on multiple projects, and absent or inadequate tools appeared among candidates not mapped to standard software-engineering antipatterns. The abstract does not establish how common these problems are or how much damage each causes, so use the findings as a vocabulary for reviewing your process rather than as a ranking.
A practical review routine
Run this routine at a fixed interval and at every major milestone:
- Play the current build from the start far enough to encounter the latest work.
- State the one-sentence promise aloud and identify where the build currently delivers it.
- List unfinished work required to reach the ending, including integration and testing.
- Compare that list with the time and capacity you actually have, not your original estimate.
- Move every nonessential idea to the backlog.
- Choose one cut, simplification or deferral if the required path is not credible.
- Assign the next milestone an acceptance test and a date for the next review.
Keep a short decision log: date, decision, reason, affected tasks and reversal condition. It prevents an old idea from returning without the trade-off being remembered.
When scope creep has already taken over
Symptom: the game has many systems but no complete path
Stop adding systems. Build the shortest route that uses the strongest existing mechanic and reaches an ending. Remove systems that are not needed on that route.
Symptom: every level requires new technology
Standardize the content recipe. Reuse proven interactions and vary challenge, context or sequencing. A smaller set of rules tested deeply is easier to finish than a large set of one-off mechanics.
Symptom: polish keeps replacing testing
Freeze new presentation work until a fresh player can complete the required path. Fix misunderstandings and blockers first; visual refinement cannot compensate for an unclear objective or broken progression.
Symptom: you are afraid to cut because of time already spent
Calculate the remaining work and the release value of the feature. If removing it shortens the path or reduces dependencies, cutting now may protect more of the game than finishing it would. Preserve notes or assets separately if they may serve a future project.
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The decision rule that keeps a solo project finishable
At any moment, the project should have one protected route from a new game to a clear ending. New ideas may enter only when they strengthen the central promise, fit the remaining capacity, and replace or delay an identified piece of work. Prototype the riskiest assumption before expanding content, review scope at scheduled cut points, and call the release done when the complete path is reliable—not when the backlog is empty.
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