ToolFO

I'm assuming gravitational waves are massless since they travel at c...How can 3 solar masses of energy get converted into something that has no mass?

Are you bringing any new type of game play, mechanics, or creative elements to this game which are not present in other modern FPS? I played the original Wolfenstein when it came out while I was in elementary school and have enjoyed ID's games and legacy. But lately they seemed to have grown stale and not really brought anything new to the table.

How will this game be different?

Will it be mod friendly to the level that Quake 2 & 3 were?

Well, why are they?