FIRST ENDING - I want the zone to disappear.
Requirements: You must have an excellent reputation value (+1000 points), however you can't have a lot of money with you (less than 50000 RU).
Additional info: If you want to get rid of the extra cash, try buying unwanted objects from one of the traders. Once this is done, throw these objects out of your inventory. It's much easier to score a high reputation value.
SECOND ENDING - I want to be rich.
Requirements: You must have a lot of money - more than 50000 RU.
Additional info: This is a most common ending, at least in my personal opinion. You shouldn't have any problems gathering 50000 RU, especially if you've checked bodies of fallen enemies and sold a lot of valuable objects to all three traders.
THIRD ENDING - I want to rule the world.
Requirements: You must kill leaders of both organizations - Freedom and Duty. It's going to be much easier with Freedom. Lukash can be found in the army base (Army Warehouse sector). It's much more difficult with General Voronin. He's stationed inside a military bunker in the Bar sector. Once he's dead, you would have to kill all of the remaining Duty soldiers as well.
Additional info: This is one of the possible endings for bad characters. You will probably have some problems achieving it, especially when it comes to killing the general.
FOURTH ENDING - Humanity is corrupt, mankind must be controlled.
Requirements: You must have a bad reputation (less than -1000 points).
Additional info: I guess it's fairly obvious what has to be done here, however you could have some problems gathering 1000 negative points. You will have to kill everything that stands in your way, including friendly characters.
FIFTH ENDING - I want immortality.
Requirements: You will only be able to unlock this ending if you didn't manage to fulfill the requirements for four other endings of the Wish Granter. Here's what you have to do:
1) you must have a reputation between -1000 and +1000 points
2) general Voronin and Lukash must survive
3) you must have less than 50000 RU in your inventory
Additional information: I guess I won't surprise you by telling that it's going to be very difficult to see this ending, mostly because you would have to know what to do with your main character from the start. It's an interesting option, but only if you plan on playing the game from the start.