Edge of Empire: From Crime to Consequence
Directly after the first session, you may decide to reroll your character and make a completely new character, with no penalty. I will work out a way to get your old character out of the story and your new one in.
Once we have started the second session, the rules will work slightly different. This will be the case both for new characters you choose to play (because you are tired or your character or they did) and for new players we invite to game with us.
New characters will start with the total amount of xp for their species, plus any xp earned by the entire group. They will gain no benefit for any individual awards that players have earned themselves in the past, which means they will typically be behind our existing PCs. Since Star Wars is a dynamic galaxy and there are lots of ways for characters at all power levels to contribute, I think this should be a nice compromise.