Get 100% completion for Enter Digiton. Includes; Mask locations, achievements and collectables.
Everything here is straight forward. The only obscure thing is obtaining the Carnival key when you get your Teleport upgrade. Use this to unlock the Carnival, deposit souls until the bar fills up and receive your hard earned mask.
Upgrades that are required are the Teleport upgrade and Bubble upgrade to obtain all collectables. There is also a hidden achievement here marked on the map. Simply smash the ice and talk to the snowman to obtain it.
On order to obtain all the collectables, the Bubble and Teleport upgrade is required. There are two shops, selling a total of 3 masks.
This area only has collectables. You should have all the upgrades by now, so they won’t be too much of a problem.