Here is the full list of all 9 Unsolved Case achievements. It takes around 1-2 hours to unlock all of the achievements on Windows.
Complete Unsolved Case Playing as Old Dog
Lose 100 balls
Correctly tune the walkie-talkie
Complete Unsolved Case Playing as Ally
Complete the forklift maze
Enter the shipping container and get trapped
Find The Number of the Beast channel
Direct the laser to the wrong goal
That's not how it works...