Mouse P.I. For Hire Walkthrough - How To Get 100% Achievements

Mouse P.I. For Hire is a stylish noir-inspired adventure that blends classic detective storytelling with puzzle-solving and exploration. With its cartoon aesthetic and surprisingly deep mechanics, the game offers more than just a linear story - it challenges players to fully explore every corner, uncover hidden secrets, and complete a wide range of achievements.

If you’re aiming for 100% completion, you’ll need more than just finishing the main storyline. This guide walks you through everything you need to know - from core progression to hidden collectibles and missable achievements.

Understanding the Structure of the Game

Before diving into achievements, it’s important to understand how the game is structured. Mouse P.I. For Hire is divided into chapters, each representing a different case or part of a larger investigation.

Each chapter includes:

• Main objectives (required to progress)
• Optional interactionsHidden collectibles
• Unique achievements tied to decisions or exploration

The key to 100% completion is thorough exploration during every chapter, as some achievements are missable if you progress too quickly. If you want to learn more about the game’s overall feel and mechanics, you can read our first impressions in this review.

Tip 1: Explore Every Location Carefully

The game rewards curiosity. Nearly every room, alley, or office contains something important - whether it’s a clue, collectible, or hidden interaction.

To ensure you don’t miss anything:

• Interact with all objects, even those that seem unimportant
• Revisit locations after major story events
• Check for dialogue changes with NPCs

Some achievements are tied to very specific interactions that are easy to overlook.

Tip 2: Talk to Every Character Multiple Times

Dialogue plays a major role in unlocking achievements. Many NPCs have multiple lines that change depending on your progress.

To maximize completion:

• Exhaust all dialogue options
• Return to characters after key story moments
• Pay attention to subtle hints

Certain achievements are only unlocked if you uncover hidden dialogue threads.

Tip 3: Collect All Hidden Items

Collectibles are scattered throughout the game and are often tied to achievements.

These may include:

• Case files
• Notes
• Hidden objects
• Environmental clues

Some collectibles are well-hidden and require careful observation of the environment. Missing even one can prevent full completion.

A good strategy is to treat every area as if it contains something important.

Tip 4: Pay Attention to Puzzle Solutions

Puzzles are a core part of Mouse P.I. For Hire, and many achievements are linked to how you solve them.

For example:

• Solving puzzles without hints
• Completing puzzles within a certain time
• Finding alternative solutions

Take your time and experiment. Rushing through puzzles can cause you to miss achievement opportunities.

Tip 5: Avoid Skipping Dialogue

Even if you’re replaying sections, avoid skipping dialogue too quickly. Some achievements are triggered by specific lines or sequences.

Skipping dialogue can:

• Cause missed triggers
• Prevent hidden choices from appearing
• Lock you out of certain outcomes

For a 100% run, patience is essential.

Tip 6: Use Multiple Save Slots

One of the most important strategies for full completion is maintaining multiple save files.

Why this matters:

• Some achievements are tied to choices
• Certain actions are irreversible
• Replay time can be reduced significantly

Create saves before major decisions or transitions between chapters.

Tip 7: Watch for Missable Achievements

Not all achievements can be obtained in a single playthrough.

Some are tied to:

• Specific dialogue choices
• Unique puzzle approaches
• Optional story paths

If you’re aiming for efficiency, research which achievements are mutually exclusive and plan your playthrough accordingly.

Tip 8: Replay Chapters Strategically

The game allows chapter replay, which is extremely helpful for cleanup.

Use this feature to:

• Collect missed items
• Unlock alternative achievements
• Try different choices

However, keep in mind that some achievements may still require a fresh playthrough depending on how progress is tracked.

Tip 9: Focus on Story-Based Achievements First

During your first playthrough, prioritize completing the story and naturally unlocking achievements tied to progression.

This approach allows you to:

• Understand the game’s mechanics
• Identify areas you may have missed
• Prepare for a second, more optimized run

Trying to do everything perfectly on the first run can be overwhelming.

Tip 10: Clean Up Remaining Achievements

After completing the story, you’ll likely have a few achievements left.

These are usually:

• Hidden collectibles
• Alternate puzzle solutions
• Missed interactions

Use your knowledge of the game to systematically revisit chapters and complete any remaining objectives.

Common Mistakes to Avoid

Even experienced players can miss achievements due to small mistakes. Here are the most common ones:

• Rushing through dialogue
• Ignoring minor interactions
• Forgetting to revisit locations
• Not keeping multiple save files
• Overlooking environmental details

Avoiding these mistakes will save you a lot of time in the long run.

Estimated Time for 100% Completion

Reaching 100% in Mouse P.I. For Hire typically takes:

• First playthrough: 8–12 hours
• Cleanup and replay: 4–6 hours

Total: approximately 12–18 hours, depending on your playstyle and efficiency.

Completing Mouse P.I. For Hire at 100% is a rewarding experience that goes far beyond finishing the story. The game encourages exploration, attention to detail, and thoughtful decision-making.

By following this guide, you’ll be able to:

• Avoid missing key achievements
• Optimize your playthrough
• Fully experience everything the game has to offer

The most important thing is to take your time. Mouse P.I. For Hire is designed to reward players who pay attention, think critically, and explore every possibility.

If you approach it like a true detective - observant, patient, and thorough - reaching 100% completion is not only achievable, but incredibly satisfying.