First one is a explosive charge that you can "stick" to walls,add more explosives,and detonate them all at once at will. The second one is a rocket launcher that when you fire it it will launch a homing rocket that will lock on to the closest vehicle.The rocket should have moderate damage and reload time be kinda slow. I hope you take these into consideration.
Another idea...A rocket launcher that when the projectile hits a brick it fake kills it and the projectile passes through but after it goes through the fake killed brick the projectile detonates in maybe 500-1000 milliseconds.If the projectile hits a big brick (eg. a baseplate) the projectile simply explodes!
