The Rampage-4 is very uncommon in campaign.It's only seen on Operation Blockbuster,Dragon-King of The Sea,and Surgial Strikes with no attachments(Always).Its DMG is really high and range is high for rocket launchers.Silmar to the ZXD,the Rampage-4 can be kill from 3 feet away(like frags and sticky grenades).It cost 18,000 gold credits to buy the Rampage-4 on Multiplayer.It's a useless weapon to some players,so n00bs camp these with them.However,the Roar 3000 or the N1014 can be a useful weapon to all the players in Modern Combat 3:Fallen Nation.