DEATH BY CUBE
12 Achievements
200
Xbox 360
Xbox One
Xbox Series
CUBE FIRST WORLD COMPLETE
1 world completed.
20
How to unlock the CUBE FIRST WORLD COMPLETE achievement in DEATH BY CUBE - Definitive Guide
simply complete the 4 levels in the IO area. if you are having trouble, remember to dash and try using the upgrade called homing. If you go for dashes and multi-kills you can pick up more power ups quickly and overpower the enemy quickly.
Self explanatory, earn enough coin to purchase the 2nd world and this will unlock.