The On The Edge Add-on for Frostpunk has 20 achievements.
Contact New London
Cut down all the trees in Outpost 11
Rename Outpost 11 to you-know-what
Complete all improvements in Hot Springs
Complete all improvements in Shipwreck Camp
Complete all improvements in Children's Mine
Build a safe route
Develop all settlements to the highest level
Explore all Frostland sites in On The Edge scenario
Always take the risky choice on Frostland in On The Edge scenario
Build all safe routes
Make all other settlements loyal to you
Make all other settlements distrustful towards you
Let New London fall in On The Edge scenario
Save New London in On The Edge scenario
Finish On The Edge scenario on Hard difficulty
Finish On The Edge scenario in Survivor Mode
Make all other settlements loyal to you in Endless Mode
Have an ally send Emergency Aid to another settlement
Make all other settlements distrustful towards you in Endless Mode