Black Box

The black box is a rocket launcher type weapon for the soldier, it can be found in all non chest sources beginning on the second level. It is identical to the rocket launcher except that is has 3 rather than 4 slots in its magazine and it heals the player. The healing done is a direct 2 per enemy caught in the explosion, plus another three 0.1 hp medibeams, also per enemy caught in the explosion, but these are limited in range, and extend no further than the cart can heal.

Strategy
Mandarbmax says: This is better than the regular rocket launcher, reloading is perfectly safe as long as you are smart enough to get behind a wall. The healing is so complicated because hutty wanted it to look pretty or something.