Red Barrels (or game equivilant).
Guns. Shooting. Melee.
Op how old are you? Because everything you list has been around YEARS longer than Halo 3. The flamethrower has been in dozens of games, sticky (plasma) grenades at least 10 years since Halo 1 and grenade and rocket launchers are a shooter staple dating back since (I'm guessing) before you were born.
Also the boomshot in Gears of War is a grenade, not rocket launcher (notice the trajectory of the round, dipping? That's characteristic of a grenade not rocket) so yeah... seen before Gears 3.
Guns. Shooting. Melee.
Op how old are you? Because everything you list has been around YEARS longer than Halo 3. The flamethrower has been in dozens of games, sticky (plasma) grenades at least 10 years since Halo 1 and grenade and rocket launchers are a shooter staple dating back since (I'm guessing) before you were born.
Also the boomshot in Gears of War is a grenade, not rocket launcher (notice the trajectory of the round, dipping? That's characteristic of a grenade not rocket) so yeah... seen before Gears 3.