Im on hydroponics and for some reason there werent 2 vials of toxn a in the room where there should be 2 so I canät seem to complete the mission... Now I wonder if there's any way to restart a lvl, some cheat code or downloadable save files

you can try loading the autosave, but I think you just need to look for the vial elsewhere.

Perhaps one of the Vials fell to the floor?

However, I'm pretty sure that there are 5 vials of Toxin-A scattered around Deck 3. So, if you're missing 1, you should still be okay to finish the objective.

Edit to add: I don't know of any way to restart except to reload an old save.

and how do i find the autosave!? I only have my quicksaves and my regular saves (which is right where I am now) Never heard anything about a fifth vial?

EDIT: A foudn the autosave. it's too far into the level... damn it do i have to restart the whole game!?

as long as you have 4 vials, you are fine.

I confirmed via a walkthrough that there are definitely five vials of Toxin-A in total. So, I'd just keep exploring Deck 3. You should be all right! :)

...Well, except for the annelids and the midwives and the turrets and....

http://www.sshock2.com/ss2walk/#hydro

Look under "Vial locations", a few lines down from the start of the Deck 3 section.

wow! never read about that in any other guide, u saved my life man!! up to the mysterious deck 4...