stuck at Zombie Infection 2

[SpacePlefka]

I am at laboratory at the moment.
i was at a point where a zombie killed a woman and vanished.
instead of running after him or checking the area to the right, I went through the door which was on top of the screen. I entered a new area and wasnt able to go back. in that area I found a piece of paper with a code, just the first two numbers, 1 and 9. there are also metal boxes at one point which i cant move and a door which I cant open cause i dont have the full code.
I think I should have checked the other area completely first before going through that door...can anybody help me giving me the code or some other advice to continue, please?

[taikucingg]

The code is 9 1 2 0

[SpacePlefka]

Are you sure?
Are you talking about the laboratory or the mines? Im quite sure it started 19 and not 91.

[SpacePlefka]

Never mind, I totally missed one door. I found the other part of the paper
Thanks for trying to help tho

[taikucingg]

sorry if im mistaken because i finished the game long time ago
o yea you might want to reserve some ammo and medikits because you will fight 2 "lions"

[SpacePlefka]

Just killed them, now im on a helicopter

[Saferwound]

Im at the last boss of the game.. Its like an octopus.. I finish its all health once, then its health is full once again.. Then it hits with its arm 4m underneath the ground.. Its damage is too much. I cant even dodge its attack. Soon all my medkits and capsules are over.. It seems impossible to kill this boss.. Im playin in hard difficulty level. Pls tell sm trick to kill it..
Thank u..

[Chirika]

Im at the last boss of the game.. Its like an octopus.. I finish its all health once, then its health is full once again.. Then it hits with its arm 4m underneath the ground.. Its damage is too much. I cant even dodge its attack. Soon all my medkits and capsules are over.. It seems impossible to kill this boss.. Im playin in hard difficulty level. Pls tell sm trick to kill it..
Thank u..

Kill the final boss in hard mode is very hard , after a long time I finally finish, the trick is you should dodge its attacks as many as possible or use the medikits, capsules, use the shotgun to kill all the zombies and hit the boss until the health bar of the octopus remains half or less than, it will be more easy to kill it from there,then you can use the launcher (or the shotgun)to kill it, be sure you get a lot of gold (to buy ammo and medikit).