Box Simulator for unturned

This game simulates box opening from one popular title. It's clearly the most accurate and advanced one. 

On the main screen you have option to choose a active box, open one, check your items from inventory, visit marketplace or even do contract trade-up. 

Opening a box will cost you some virtual cash which can be restored when you sell your item. Selling an item is not necessary, you could easily collect 10 same rarity items and trade them for one grade higher one.
Game has all boxes included, for example Hot Mystery Box, and all Mythical items are present aswell.
Game has in-game marketplaces for trading, you are able to buy cool items aswell as sell them for profit.
Your progress is tracked and there are a few achievements to complete.