1. The save game dialogue defaults to the name of the last save. This is normally fine, but that default is carried forward if a new game is started, which adds a possibility of overwriting the save of the last game/map you were playing on. This should never be the case for after a new game was started. The name field should be blank for the first save on a fresh game/map. This is further complicated by #2.
2. There is no overwrite prompt for overwriting a save. This means that if a player starts a new map, plays it for a few hours, and then does the reflex of saving it before quitting, if they go with the default option presented, they have just overwritten the save of their *other* map that they were playing on with not so much as an 'are you sure?'.
This is the sort of expected behavior from anything that starts something new. If you start a new word document, the first attempted save of that document does not default to the name of the previous document you had open. Folks would lynch Microsoft if that was the behavior
![Smile :)](./images/smilies/icon_e_smile.gif)
Recommendations:
1. New games should clear the previous/default save game name variable, forcing the player to enter a new name for their new map or choosing another from the list.
2. Save game overwrite prompt might also come in handy. The game already prompts to save upon quitting, it should also prompt for overwriting. If we don't want to bombard the user with prompts there, perhaps make it so that overwriting is only prompted if the player attempts to overwrite a *different* save than the previous one, but care must be taken to fix #1 first, otherwise the code will just overwrite other prior maps without prompting.
*edit* as an additional note, the previous save default carries over to a new game even if one was started just after launching Factorio - not only if a prior map was loaded within the same session.