On Bungie's "Grenade Launcher" sound: Having actually used a similar weapon "back in the day", I've always hated the standard "Grenade Explosion" sound in all flavours of Marathon. It's unrealistic, grating, lacks power. So I decided to change it. But, if you're not using headphones, the difference will probably not be as dramatic as you'd expect. Sound was created by combining the original Marathon grenade sound with a Dorf Bottle exploding (from Bungie's "Myth: TFL").