Sas: zombie assault

Make sure to use plenty of turrets. They make the further, harder zombies much easier. Also, a lot of the guns arent that useful. I found the final machine gun worked the best

I found it easier to survive in the large room to the west. Gives you more kiting room for the spells they shoot at you. Save up for machine gun, once you have it set up 2 or 3 turrets in the room with you. Was never in danger of dying.

Alright, just played it the second time around for the blood thirst quest and just to lump everything together:

Like i stated previously, the room in the top right is where i find it easiest to survive. Just continue to fix and repair the baricades in that room and leave the other ones alone. The way i played it on hard was i used the handgun for the first few levels and i believed i also bought the shotgun at the start for quick kills as well as the assault rifle(kills one per the three burst shot usually) and then finally the machine gun. When i had the machine gun i just didnt let up on the trigger. Continue this until you have enough money again to upgrade the barriers and concentrate on upgrading those until they are maxxed out. With that being done now just concentrate on turrets. All i used were the heavy artillery turrets and they seemed to work well. Pay attention to the sounds and make sure you know which zombies correspond to which sounds so you know what is coming. The big red guys are slow and easy to kill, the bats take out barricades for good so just kill them before they can reach the three you are protecting and the big blue guys will shoot you with energy pulses or something and spawn a bunch of little skeleton monsters. Strategies for each are simple:
Red Zombies - Depending on the gun just take a step back and shoot them. They dont take much to kill and they are too slow to pose any real threat.
Bats - Look for the white dots on the screen, if you see one going for one of the barricades you are protecting just take aim in the direction and get rid of them. You will probably have the machine gun by now anyways which makes it quite easy.
Blue Zombies - The are the toughest ones. On their own you can pretty much just shoot them and take them out without much problem but when there are quite a few of them they tend to have enough time to spawn the skeletons to block themselves and take tons of shots on you. Just continue to move side to side to avoid the shots they take and take out all the skeletons to finally reach them. They take tons of damage if they hit you so try and avoid their energy pulse things as much as possible.

That is about it. That is the strategy i used and in terms of the quest it should allow you to reach the 20,000 points

sorry, the last thing that i forgot to mention is to make sure the bats dont get to your baricades, they are the white blips on the screen. My experience with them was that they destroyed the baricade and the baricade could not be put back up afterwards.

what I do is just stay in the top right room and just guard those 3 barricades

Major tips:

1. All your cash gets added onto your score as bonus points, such as if you have only 12K points, but 9K cash, then you have 21K, so the quest is beaten.

2. A proximity mine does NOT hurt you, so placing one at your feet and standing on it will be extra defense.

2. Since you can pause the game as well as go to the upgrade screen at the same time, how about running straight into the swarm, and buying one, it would kill most of them off instantly, if it's not enough, well guess what, you can do it AGAIN if you need too. After all, the only reason you should have to do this, would be if you are late in the game and need to knock out a mass of them coming at you together.

3. Your health refills EVERY LEVEL, so don't get caught in a corner, run THROUGH them to a better spot. You could even place mines when you go through them.

4. You don't NEED every gun, so just buy what you do need, the more cash on hand when you finish the more points you have.

5. Every time you upgrade the barricades, all of the broken ones are replaced instantly, so instead of running around and fixing them all, just upgrade it by 1.

6. You DO NOT need fully upgraded barricades to win this game.

7. A mouse will be of more use then a touch-pad, I'm stating that as a fact from experience, since I'm using touch-pad.

If you are using a touch pad, give up until you have a mouse. Worked like a charm for me.

Save up for your first purchase: L85A2 assault rifle

YOUR IPOD HELPS A LOT

If you decide to stay in the room that warrior suggests. Put a heavy turret in the one unbarricaded opening. I profited about $100 per installment

in order to look at the walkthrough, click on SAS zombie assault

never mind just look at the walkthrough

Edit to #5:
Even though it will no longer replace the destroyed barricades, it WILL fix all cracked ones if you upgrade.

Strike the LOWER #2, it no longer works, you can no longer run through zombies.

UPPER #2 does still work though, since you're still immune from pain from the mines still, abuse that until it's fixed.

Strike the #5 tip, that glitch has been fixed. At least it doesn't work for me anymore.