Group before you chase
A complete community achievement guide is useful because it reveals which unlocks share a route. Start by grouping them rather than following the platform list in display order.
Story and ending achievements belong on a route sheet; repair and shop goals can often be handled during normal progression.

Mark the missable checkpoint
When an achievement depends on a choice or competition, identify the last safe save point. Do not overwrite it until the unlock appears.
For cumulative tasks, record visible progress before and after the action so a stalled counter can be reported clearly.
- Use current platform wording.
- Group by route.
- Mark missable decisions.
- Keep a checkpoint.
- Confirm the unlock before continuing.
Avoid save-file shortcuts
Several community guides offer save files for specific unlocks. They may save time, but they remove the evidence needed to understand the route and can introduce unknown state.
A personal checklist takes longer and produces a result that can be reproduced after a patch.

Sources
Steam community 100% achievement guide →