Plan and test game mechanics

A mechanic needs an observable rule: an action, a change in state and feedback to the player. Before adding more systems, test whether the first action, win condition and restart work together. The existing guides below provide the starting workflow and debugging checks.

Open Mechanics collection ↗

Prepare a game for publishing

Publishing starts with a game that can be tested, understood and maintained. Check the available creator controls, audience settings and safety requirements before a release. Use the publishing guide for the sequence, and the troubleshooting guide for an actual blocked step.

Open Publish collection ↗

BC-0166 · TROUBLESHOOTING

Editorial review 2026-09-26 · Official sources conflict

Roblox Build Game Does Not Load

A generated game that does not load should be traced from opening the identified project to its first usable frame. Record the last stage actually reached and any exact notice. Do not rewrite gameplay or buy another generation before distinguishing a launch failure from an access restriction or an unfinished load.

Symptom

An identified generated game is opened but never reaches an observable playable state.

Immediate action

Record its opening context and the last successful visible transition before diagnosing gameplay.

Diagnostic branches

An explicit account, audience or moderation notice prevents entry.: Use the matching legitimate restriction guidance and preserve the notice.
The open action has no confirmed acknowledgement.: Inspect the opening action rather than assuming the game loader executed.
Loading begins but no game frame appears.: Retain that boundary and any error without assigning an invented timeout.
The game frame appears but a player action does not respond.: Move to input or start-control diagnosis; the initial loading boundary was reached.

Least-destructive change

Preserve the identified project and launch trace instead of replacing its generated content.

Retest

The opening context is explicit and is not silently switched between tests.
Restrictions are separated from unexplained loading states.
A harmless comparison uses an existing project or is honestly unavailable.

Escalation

Provide the actual project destination, launch trace and error to official assistance when the game remains inaccessible. The playtest source conflict shown here means a missing test surface must not be diagnosed as a broken game by itself.

Working notes

Establish which game you opened and from which actual route or control. The project editor, an available test surface and a published destination are different contexts. Record the context rather than assuming a failure in one establishes failure in all of them.

Follow the visible sequence: open action, acknowledgement, loading state, game frame, start control and usable player response. Stop the trace at the first transition you cannot observe. This identifies the missing boundary without claiming to know whether its cause is assets, code, network or account access.

An explicit age, region, permission or moderation notice belongs to the matching access or publishing guidance. Preserve its wording. A load spinner without such a notice does not establish that restriction, and a working game elsewhere does not override an actual access decision.

If a safe comparison is available, open an already existing game through the same context and record whether it reaches play. Do not generate or purchase a new comparison project. A difference narrows the report; it does not prove the original is corrupted or identify a server fault.

Examples

Launch trace: project selected → acknowledgement visible → loading view → no game frame observed. This is not yet a controls failure because the interaction surface was never reached.
Access trace: published destination opens an explicit audience notice before play. Preserve the notice and use audience guidance instead of trying to repair movement.
Comparison record: intended project identifier / opening context / last visible stage / exact notice / existing comparison outcome if safely available. If no comparison exists, retain a single-project report rather than creating one.