Both Tubes (Achievement)

Both Tubes is an Achievement in Halo 3: ODST. It is unlocked when the player gets 10 kills with a Rocket Launcher during the Kizingo Boulevard Mission. It is worth 5 Gamerpoints.

It is represented by a red and silver signpost with a rocket launcher in front of it.

Trivia

 * An easy way to do this is to either play co-op, or if you are playing solo, trade your rocket launcher with a marine, and have him ride your Scorpion. His kills will be registered as yours.
 * Another way is at the beginning of the level, behind the empty scorpion there is a crate. Behind the crate is a rocket launcher with four more rockets.  This still means you must get multiple kills with each rocket though.
 * There are also two marines toting rockets on a building in the first courtyard. They'll come down if you are driving a vehicle, and you can kill them for extra ammo. If you don't mind that sort of thing.