The Back to the Future Special Pack Add-on for PowerWash Simulator has 10 achievements.
Complete the Doc Brown's Van job
Complete the Time Machine job
Complete the Clocktower job
Complete the Holomax Theater job
Complete the Doc's Time Train job
Watch the Time Machine reappear
In the Clocktower job, ring the bell
In the Holomax Theater Job, activate the holographic shark
In the Holomax Theater job, clean the Grid Wall first
In the Doc's Time Train job, clean the Flux Capacitor and its Particle Colliders first