Here is the full list of all 42 Holyday City: Reloaded achievements. It takes around 200 hours to unlock all of the achievements on Windows.
Buy the 96th Upgrade
Unlock the Airport (Reach town lvl 22)
Obtain The Golden Watch Prestige Item
Play 2 hours
Unlock the City Aquarium
Reach 365 Trophies
Hire the Manager "Diego, the Young"
Obtain All the Marina Items
Obtain the Scuba Gear from the Marina
Go max level in all Time Paradoxes in the Atomic Lab
Buy the 36th Upgrade
City Facilities 555 total
Reach Town Lvl 26 (Holyday City)
Reach Town Lvl 31 (Skyline City)
Unlock the Marina (Reach Town lvl 14)
Sign your 1st Contract
Upgrade your Port to Lvl 20
Do the Investment "Cooling System"
Get your 1st Lab Profit Paradox
Get 1 of each time paradox in the Atomic Lab
Get 1 City Facility
Buy at least 1111 of each Business
Buy at least 333 of each business
Buy 1 of each Business
Reach 150 Trophies
Unlock the events (Reach Town lvl 5)
Do the Investment "Scale Economy-o-meter"
Upgrade your Port to Lvl 2
Buy your 1st Upgrade
Reach Town lvl 2
Hire the Manager "Jimmy, The Advertiser"
Reach 50 Trophies
Reach 10 Trophies
City Facilities 1200 total
Increase your Profit Paradox to Lvl 50
Reach 580 Trophies
Buy 60 Aquarium items
Sign a Contract with all Agents
Hire the Manager "Audrey, The Mystic"
Play 24 hours.
Play 148 hours.
Play 999 hours.