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 and take your fellow ODST's rocket launcher, or if you are playing solo, trade your rocket launcher with a marine (which would also give you the Trading Down achievement), and have him ride your Scorpion. His kills will be registered as yours. Marines are very weak, however, so if he dies, you must retrieve the Rocket Launcher and give it to a new marine.
 * Another way is at the beginning of the level, behind the empty Scorpion there is a crate. Behind that crate is a rocket launcher with four more rockets.  This still means you must get multiple kills with each rocket though.
 * When you get to the point in the level where there is a arrow over your teammate Dutch, there is a marine with a rocket launcher with four rockets on top of the building where you find the broken gauss turret beacon, though he will sometimes be killed by the Wraiths.
 * There is a total of ten rockets altogether in this level so you only need to get one kill with each.
 * It is possible that the name is a sexual reference.