I said it was coming, and here it is. The three steps I follow to make a workable and vaguely interesting backstory that will work for any game that doesn’t require extensive and detailed character histories. I’d pop in a little more detail if you were going to play in a social LARP or Sandbox (GM creates a world and unleashes the players upon it. Plot hooks, no railroad.) game.
Generally you make a character while considering the others in your party, and choose a class first (in the tactical games, at least.) so I suggest grab the rough outlines of your mechanics, and build the backstory around that.
I’m going to be using one of my new favourite characters. His personality and powers are best shown in a rules-light, “make up your own damned abilities” game, but he’s a great example of how my three steps turned a basic idea into someone that can entertainingly work with the others in the party. If more questions arise while writing, run with them.
Enter Karas, the Herald of Death.