In ATOM RPG you can easily become a victim of many opponents. This way, it is very easy to die in the first hours of the game. However, if this happens, the game will load in the place where you last saved it.
The game is saved automatically every time you change location. Remember that if you die a moment after moving to a new location, you won't lose much progress. However, if you spend a lot of time in a given place before the fight, save the game.
Also remember that in case of the survival difficulty level, you can't load a save after you die. If you die, all your saves will be deleted.