Treasure chests offer an opportunity to obtain extra loot via the keys you obtain from playing stages. There are two types of treasure chests in Kritika: normal chests and gem chests. For both of these types there are 3 levels: bronze, silver and gold.
In order to open these chests you must first obtain their respective level keys: For example a bronze chest will require a bronze key to open and a silver chest will require a silver key to open. It is important to note that gem chest keys and normal chest keys are different from each other and are not interchangeable (so you can not use a silver gem chest key to open a silver normal chest).
There is also a special chest which can only be opened by the use of tickets or karats. This chest offers a chance to draw a premium equipment part of your choice. The grade of the item will be epic - legendary.