@qzwxe Try the double agent tip I posted below. Not only will the police not ask for 1000 dollars, they will also attack robbers (The police don't attack robbers when you don't do the Oswald mission, I think). The police are so fast, they will often catch the robbers before you get near to the robbers.
@michel500 yeah, I had the same issue first time I played regarding cars/fuel. To deal with this, first develop Hara's fuel production. Do this by bringing lots of crude oil to Hara. The easiest way to do this is by bringing crude oil from Qubba since Qubba never seems to run out of it. You can also bring crude oil from Diep Gat or Verdammter Platz. This strategy is a little bit trickier however, because you will likely have to bring Fuel to these cities to support their crude oil production (yes, fuel is needed for crude oil production). Good luck.
How to be a double agent (spoilers):
First, go speak to Oswald in Qubba. Accept the mission to go to Fort Goks and get the paperwork from him. Don't go to Fort Goks, however. The police will then be out of your hair. You can trade free of the 1000 dollar fee until you are rich. Then, when you have amassed enough money, you can go back to Verdammter Platz and start the Desert Patrol missions. (or of course, you can continue the Oswald missions - though I don't find these that fun)
Eventually, as you complete the DP missions, the police will start attacking you again, but by then you'll be rich and be able to easily deal with them.
Jim618, the saved files are stored in your browser's cache, so if you somehow transferred them to your other computer it could work. Probably not worth the effort of doing though.
I just died at level 15 on Extreme. I used psychosix's strategy. I tried many different strategies but psychosix's strategy of using a warrior with shield wall was the only that worked (see his comment on Feb. 26). I made a slight adjustment. Instead of a mage and a ranger, I used two rangers (I think rangers are better). Here are some tips: avoid boss battles until you have an item that lets you retreat instantly. This will save your neck. Clear the rest of the levels. Don't chose equipment only based only on armor rating. The equipment's other stats are more important especially power regeneration. Also, the tip of using hail of arrows combined with a high lethality has been mentioned on the comments. This doesn't work. The developer probably realised it was too powerful and removed it. Good luck!
Anyone have any extreme tips? I can only get to level 4 before dying at the boss. I found that using 2 clerics (you really need the healing on extreme), 1 rogue (for the power draining skill on bosses), and one warrior (for execute) is the best combo.