You typically start each turn with 3 AP to spend on playing cards. Any cards left in your hand at the end of a turn are discarded.
You can see exactly what an enemy will do before they act; use your cards to position yourself away from their targeted zones. Theseus.Protocol.Early.Access.zip
You start with one character (like Charlotte) and unlock others (like Antiope) by leveling up through repeated runs. Each has a unique starting deck and weapons. You typically start each turn with 3 AP