Substance of Matter
Obtained from: Frank
Difficulty level: Medium
Reward: 8500 Exp, Deathstalker Mod
Bring aluminum potassium from the warehouse to the lab
Frank can be found in one of rooms inside the Block A2 #1. He will ask you to bring him a chemical compound, which is necessary for his research. You have to leave the lab building and go to its northern side where you'll find a gate (1) #2.
Move forward, killing Walkers along your way. You'll get to the gate, which you can bypass by climbing the yellow boxes #1. Go through the warehouse door (2) - you'll be attacked by three Walkers. Before you get a canister, open the main gate by pulling out the plank blocking it #2.
Take fluid #1 and return to Frank #2 - place the canister next to the door. If you come across any zombies along your way you have to throw away the canister and kill them - you're not able to use a weapon while carrying something.
Obtained from: Scientist
Difficulty level: Easy
Reward: 8000 Exp, Magnum
Acquire the samples from infected's muscle tissue and bring them to the lab
The scientist sits in the Block A2 in the room with the operating table with undead on it (1) #1. Your task is to get samples from muscle tissue of infected locked in the warehouse (2). A new medicine was tested on them. Watch out for lots of undead both in front of the building as well as behind it #2. You can come across a Floater, a Thug and a Butcher.
Once you deal with them it is time for an easier part of the job. There are two Walkers inside the house #1 - just kill them. One is in the main room, another is locked in the toilet - you have to break the door to get him #2. Now acquire the samples from tissues of Nick and John and return to the Scientist (1).