In Astral Chain you play the role of an elite cop on the Neuron special task force. The cop you play has a Duty Rank and each time you level it up you will raise their maximum health and also be awarded a costume item. Check out our How to Level Up Fast guide to find out how you can gain levels fast.
Complete Missions
The main one is completing missions effeciently, this means performing well in combat and collecting as much Red Matter possible. Your overall score and the amount of XP you are rewarded is then determined at the end of each major and minor mission that you complete after each File.
Defeat Enemies
Your Legions are leveled up using Gene Code which you are rewarded for defeating enemies in battle, a finisher icon will sometimes appear on screen when an enemy is close to death and finishing them in this manner will earn you additional Gene Code.
Equip Legion Abilities
Your Legion can also be equipped with certain abilities that will increase their Gene Code yield, these can be unlocked by progressing far enough through their skill tree.
Check out our 'How to Save your Progress' guide to find out how you can manually save the game.
We have questions and answers related to this topic which may also help you: