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