Part 1: Infiltrate
After starting this mission, you are going to have to make your way to Franklin’s house. Unfortunately the area is guarded by a large number of gang members. Either make your way along the rooftops to the right and circle around to the property, or fight your way in. Either way you choose to go, once you reach the door, interact with it for a scene.
Following the scene, you’ll have a new toy to play around with – the grenade launcher. This bad boy can launch several types of ammunition at enemies and will explode on impact causing a specific effect in the immediate area. We’ll begin with shrapnel grenades which cause damage, sleep grenades which will knock out enemies in their area of effect for a short period and berserk grenades which will cause enemies to attack one another.
To begin with, use the shrapnel grenade to blow up the door nearby. Afterwards it’s time to go to work.
Part 2: Destruction
We need to destroy three vats containing poison in the restricted area nearby. We’ll also need to use this section to achieve our two optional objectives – Kill three enemies with a single shrapnel grenade and put 10 guards to sleep.
To start with, make your way towards the middle of the three objective markers and approach it from the east. Climb on the rooftops nearby to have a look at it. There are two enemies guarding the first vat here and another that periodically patrols up to them. Wait for all three guards to be together and then drop your shrapnel grenade on them to kill them for the objective. Keep an eye on the rooftop to the left as a sniper will show up here on a patrol route as well. If he shows up, hit him with a tranquiliser (or assassinate him).
Once you have fulfilled the first optional objective the rest is easy. There are plenty of enemies about on which you can use the sleep grenades and to make things easier, they will wake up after a short time and you can put them back to sleep again as many times as required. There are several caches of grenade ammunition on the rooftops, so putting 10 guards to sleep should be an easy endeavour.
Once you have got both optional objectives sorted, it’s just a matter of tracking down the two remaining vats and hitting each with a shrapnel grenade to destroy them. The vat to the south can be shot from the rooftops, whilst the vat in the north is at ground level and under cover, that requires that you enter the area from the western side.
Once all three have been destroyed, exit the area and a scene will play to end the mission.
Complete sequence 3