Is a demo that necessary? In the real game development world, you usually make a demo under two conditions: 1) you're not sure all that many people will be excited about your game, so you give them a freebie to get people interested or 2) you make the demo afterwards for similar reasons, but not to take of resources during the dev phase. Most major games won't get a demo until after the release of the game. Since this is ultimately a free fan project anyway, is it really necessary to spend time making the demo when you could just be working on the actual thing? Since Saga is a self executable file, how much larger will the main package be compared to the demo?