One on one asynchronous interactive fiction
Back in, many years ago, I played this role-playing game/gamebook of sorts.
My friend and I were playing Chaosium's Pendragon. He created his character, as usual, and I did the gamemastering. But we didn't have time to play together, so that's what we did:
I wrote a page in a narrative style, telling what had happened and suggesting two or three choices plus a "open choice" for the player to push his own ideas and such.
Then he'll reply with his own paragraph, which I evoluated to come out with the next section of the game, and so forth. Combats we didn't go turn by turn. I mostly run the whole thing myself, keeping close to the players ideas, until such combat arrived to some critical phase. This was necessary to keep the game going without delaying it too much.
It did work quite well, to be honest, so I'm offering you it as an idea, in case you'd want to do something similar. And you could do the whole thing by email, or go as fancy as you want.
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