1.5 Crossover
Cost (USD): $20
Release: 1.5
Update: 46

Hyper Light Drifter Crossover
+ 1 Drifter Mini
+ Small Booklet
+ 1 or 2 Story Events
+ 1 Hyper Light Philosophy
+ 1 Secret Fighting Art
+ 3 Gear Cards

This is a Crossover item and not included in any pledge level

My personal speculation is that Heart Machine would be the developer of any Kingdom Death video game

1.5 Content and Details list sourced from their corresponding update. Generally listed in 1) mini, 2) character, 3) survivor and 4) game content order
1.0 Content and Details list sourced from FDDLSTYX