Holyday Island

Upgrades can be found at

☀http://holydaycity.wikia.com/wiki/Island_upgrades

Holyday Island is an expansion to the main game that is unlocked at city level 30. It is essentially a separate game, with new businesses/trophies, new resources, and a different reset mechanic.

Island Level
Like city levels, the island level increases with money earned and gives a boost to profits and star production. Each level is e5 from the previous level. Island level is one of four milestone categories that help boost your city.

Island Businesses
Similar to the city, island businesses are divided into two "sectors" (entertainment and recreation), and are unlocked by purchasing at least one of the previous business type. All island businesses increase in cost by 1.15.

Island Resources
There are three resources used on the island: pearls, wood, and stars. Pearls are earned through ship missions in the main game, and can be spent at the souvenir shop. Wood is automatically generated in the workshop, where it is also spent. You can also buy pearls and wood with holybars. Stars are generated by your island businesses, and are also generated when using payouts on the island. They can be spent at the TV station.

Island Upgrades
There are two upgrade types here for the island: money and holybar. The money upgrades must be repurchased after a reset, whereas the holybar upgrades are permanent.

TV Station
The TV station is where you use your earned stars to run tv campaigns. Campaigns take one hour to complete (you can use holybars to finish one early) and provide a permanent boost once completed. TV campaigns are also another milestone category.

Workshop
In the workshop you use wood to craft surfboards. The surfboards provide various permanent boosts to the island. Surfboards are also a milestone category.

Souvenir Shop
Use your pearls to craft souvenirs in the souvenir shop for permanent boosts to your island. Souvenirs are yet another milestone category.

Milestones
There are bonuses for your city based on reaching certain milestones on the island.

Island Bonus
The island receives four different bonuses based on various aspects of your city.

Trophies
There are trophies for island businesses just like with the main game.

Tourists
Tourists are the backbone of your island! Earning income generates tourists, which can be "claimed" like the fee in the main game. Claiming your tourists resets your island game (unless you use an instant claim fee), but the tourists provide a boost to profits and star gains once claimed. The formula to determine tourists from total money earned is roughly: "Tourists = ( Total money earned / 15e12 ) 0.430677"

Conversely, to determine the total money needed for a certain number of tourists the formula is roughly: "Total money earned = ( Tourists 2.3219257) x 15e12"

When resetting you will lose:

When resetting you will keep:
 * Island money
 * Island upgrades
 * Island trophies
 * All island businesses
 * Island Level
 * Holybar upgrades
 * Pearls, Souvenirs
 * Wood, Surfboards
 * Stars, TV Campaigns
 * Milestones
 * Everything on the Main Game