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Available in Store

Backpack Upgrade ( 100 Store gem )

Sewing an extra pocket onto your backpack will allow you to store 10 additional item types. How else are you going to fit all these toilets and doors?

The Backpack Upgrade is a store item that adds 10 backpack slots to the player. A player begins with 16 backpack slots, including the slots occupied by the Fist and the Wrench. The initial price is 100 Gems, and it increases exponentially after every purchase. A player can have a maximum of 196 backpack slots.

The player earns three different achievements upon making upgrades on his or her backpack capacity. The "Embiggened" achievement is earned on the first purchase, the "Space Commander" achievement on the seventh purchase and the "Master of Space and Time" achievement on the eighteenth.

Backpack Upgrade Costs

Backpack Slots Price Cumulative Price
16 Free Free
26 100 Gems 100 Gems
36 200 Gems 300 Gems
46 500 Gems 800 Gems
56 1000 Gems 1800 Gems
66 1700 Gems 3500 Gems
76 2600 Gems 6100 Gems
86 3700 Gems 9800 Gems
96 5000 Gems 14800 Gems
106 6500 Gems 21300 Gems
116 8200 Gems 29500 Gems
126 10100 Gems 39600 Gems
136 12200 Gems 51800 Gems
146 14500 Gems 66300 Gems
156 17000 Gems 83300 Gems
166 19700 Gems 103000 Gems
176 22600 Gems 125600 Gems
186 25700 Gems 151300 Gems
196 29000 Gems 180300 Gems
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