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