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