IC: An ICON game as Military Academy Students
Great question! I should have put that in the original post.
I suppose the tone I'm looking for is fantastical but grounded. It's a world of magic and gods, but the biggest things moving and shaking things are the people and the nations. More serious than an average Saturday morning cartoon, less serious than a war documentary. I recognize there's a lot of in-between there, and that can be a balance the groups finds during play.
I am not looking for something particularly grim-dark or dour. In terms of content, I usually aim around high PG-13 / low R for my games, pending the comfort level of the players, of course (this, I believe, would make the game Mature here). With characters in this game essentially equating to high school/early university students, however, I wouldn't expect the game to be particularly nasty or gory.
Bit of a ramble there - I hope I answered your question adequately!