Ruby Keys

Overview
Ruby Keys are a rare resource in the game alongside the more common Golden Keys. They are mainly used to construct Unique buildings, but also some Other building projects. They can be exchanged for full energy or credits, resources and Golden Keys, if desired. They are also the only resource ingame available for purchase with real cash in the Game Store.

Obtaining keys
There are various ways to gain ruby keys, both through gameplay and other means. The ways the player have a chance to obtain free keys through gameplay are: You can get Golden Keys from all the same places.
 * from each red airlines once you get the Airport.
 * when selecting the random reward option in the Movie Theater.
 * from an upgraded Game Store.
 * from the Crystal Bank building.

The Game Store will give 1 RK per week at level 5, and 2 per week at level 10. Crystal Bank (21 RKs) 1 RK per day.

More on obtaining and general usage: See table on the Resources page.

Suggested usage
It's advised that the player first invests in the SPA center (3 RKs) for indefinite energy restoration. The Game Store will also give 1 RK per week at level 5, and 2 per week at level 10. Finally the player should save up for the Crystal Bank (21 RKs) for free daily Ruby Keys. From there, all other Unique/Other buildings can be built through the collected Ruby Keys.

Buying keys
The player can buy ruby keys in game with real money in the Game Store. The quantities avaliable to buy are 3, 9, 21 and 49 keys. With the exception of the option to buy 3, each option gives a discount of 20%, 40% and 60% respectively.

Unique buildings
Ruby Keys are used along other resources to build Unique Buildings which have special benefits. Some of those buildings can be upgraded with more RK's to get extended benefits.



Game reset
All keys are lost on game reset. If you choose to reset your island you will lose all keys you have currently avaliable, both Golden Keys and Ruby Keys. All GK's and RK's you have spent on building and upgrading your city will not be returned and will be lost aswell.