Combat in "Fallout" is like chess, because every character gets a turn. If the player attacks a character, then that character cannot act until the player is done with that attack. Then the character gets a turn to attack the player. This goes on, back and forth, until one of them dies or runs away. Some characters can do more actions per turn, depending on how long it takes to do the action, and how much agility the character has. More agile characters can do more actions per turn. 