Splinter Group

Start the mission by talking to Tannis, tells you some stuff about a group of bandits who became mutated, tells you how to lure them out (pizza) and wants you to observe and kill.

first step is to retrieve the pizza from moxxi's place. then you head on over to bloodshot stronghold, keep moving forward until you reach the room with the gap in between two parts of the room with 2 bridges, jump down into the gap and head towards the left side of the tunnel, there will be a pipe kind of opening. head through opening and you will meet some "rats" clear rooms and use the intercom. jump down through the tunnel and you will land in another room, place pizza at centre of room and the "Splinter Cell Group" will spawn. there are 4 people in total, once their shield is gone and they have around half hp left they will disappear (similar to the stalkers effect or a phasewalk) and another will appear, this continues until you vs the fourth one who disappears and all four of them reappear and you have to kill all four.

the first uses some kind of shotgun, third uses a melee weapon, similar to the omega assasins in General Knoxx.

after defeating all four you will come upon a room with crates and ammo. there is a lever contraption, a wheel and a wall switch, above a red Dahl Weapon Crate ther are 5 lights, my guess is that you aim to light all the lights with green by using the switches, however i have been unable to do so as of yet and thus created this wiki page.