How to get the Ultimate Challenge Achievement/Trophy for Immortal Planet

How to get the Ultimate Challenge Achievement/Trophy

To get the Ultimate Challenge achievement/trophy you need to complete the ultimate challenge. You will find the ultimate challenge by the cryopod in the forbidden temple area, but before you can access it you will need to defeat a hostile NPC in each main area of the game. This means defeating 3 NPCs and upon defeating each of them you will be awarded a weapon.

Once you have defeated all 3 NPC's you will be able to access the ultimate challenge which tasks you with defeating all three of the NPCs at once. Focus your attention on defeating one of the NPCs because once one is down the fight becomes considerably easier.