Because it must be a very large and boring work to make mce for every game on earth, i suggest that you skip it, and try to release a great motion creator editor instead.
With the motion creator editor i think it would be good to include a database of the default movements for all games on earth, so that when a person try to edit a mce to start playing a game, they click the games name from a game list in the editor and a lot of options get filled, like steam id and .exe, and there is prefilled the name of the movements and which keys they are bound to by default. In that way its a very fast thing to do for the user to map the hydra inputs to the different game controls.

Kind regards