You could get a bunch of cats and not feed them. They will attack anything that moves or you move to a roach free apartment.

Judging by the humor in your question, you should put on a comedy show for them. You absolutely killed.

I just buy all the roach products available and just go to war.  The poison tray things you can buy are good.  I usually buy a few boxes of those and put them everywhere; under the sink, under the fridge, in certain corners. That way you usually find a few dead in the mornings.  Then off course there's the spray for when you come across one running.  

That's about all you can do.  Buy the poison traps and put them all over.  Then buy the napalm in a can and spray the F out of any you see.

I read in an article which says the smell of onion will drive cockroaches away.So,you can buy some onions ,cut them into slices and put them in the house,tell me if it works.

Use a simple solution of soap and water. This, to some, is the easiest thing to do. Just make a light solution of soap (bath soap is fine) and water. You can splash this, spray this or just throw this on the roach. Just a little water will do, even 2 or 3 drops can kill, if used effectively. Ensure that it makes contact with the roaches head and lower abdomen (its belly if you can turn the roach over). The roach will run or try to run, but will suddenly stop and die or be almost dead in one minute. It is best to throw it out as soon as possible, as it may revive. This happens because the roach breathes through its skin. The soapy water forms a thin film on the breathing pores, and effectively blocks them (surface tension), causing the roach to suffocate to death or to near death, although it could recover if the water dries up or has not touched a large percentage of its body.

 Feed them,

• One part powdered (not granular) boric acid (sometimes sold as a roach-killing powder, but often available in pharmacies (for making anti-pinkeye eyewash), one part white flour, one part granulated white sugar. The sugar baits it, the flour makes it stick, and the boric acid kills them. Place in the backs of drawers and cabinets, under refrigerator, stove, etc. Expect at least 3 cycles of disappearance/reemergence of progressively smaller hordes of cockroaches, lasting about 2 weeks each. Continue using boric acid till roaches are gone.
   
• Kids, dogs, and some other pets will eat this mixture. Boric acid is not highly toxic, but is for external use ONLY, so place it where only the bugs can get it. It will cake hard in humid environments, so paper or foil trays may be needed.

It's better that you feed them something that will kill them later or something they will drag off into their nest. If they die in your apartment, you will have to spend all your time drawing chalk marks around the bodies.

Use a cup of flat beer. Roaches love it. Get a cup with smooth sides and let it sit out at night. Make sure the roaches will be able to get in. The roaches will fall into the beer, thinking it's super delicious and drown horribly in the beer. No idea why it works but I've seen people clear out whole clans of roaches in a few days.

Use the roach traps, wash dishes immediately, and avoid clutter.

Spray works the best for me to contain them.  Raid is tried and trusted to me.  Spray in every corner and dark spot in the house, even inside empty desk drawers, around drains and under the shoe racks.  It won't 100% eliminate all of them, but 1 stray roach every couple weeks is better than 2 to 20 a day.

Also, eliminate good hiding spots.  Moist humid dark cabinets filled with cleaners and junk, dirty floors covered in trash water, hair and dust, under the bed keep the walls clear so there is an obvious path you can see if you get down no your knees.  They like tight dark "rooms" where nobody can see a thing without pushing the plastic tote out of the way.

Also, using the spray will also slaughter flies and mosquitos and other weird critters, so it has many uses.

Give them sugar and water you meatbag.

since everything is fake wood, concrete here , i buy a small bag of bathtile grout and mix and seal every crack in the house, probably looks like crap if you dont know to grout well, pack and wipe with wet cloth after filling in the cracks. then bug bomb the hell out of the place.

Here I what I did and it worked quickly:

Mix a small amount of borax or baking soda, with brown sugar and flour.

Sprinkle behind and around appliances and under sink.

The cockroaches will carry that mixture back to their nests.

BBQ!!!!!!!

this would be a racist answer. it is not my answer , but this would be a racist answer. "invite your neighbors to a 'catch your own' dinner"

if sb gave that answer they should be voted off the board.

First and second floor apartments are prone to cockroaches in China. Go to your neighborhood market and buy some cockroach smoke generators( HUALI). At night place a few generators on the floor outside the bedrooms, seal up the bedroom doors and light the generators. In the morning sweep up all the dead cockroaches, you may be surprised how many. Do the reverse in the daytime. Put generators in the bedrooms and seal the doors to the bedrooms. After the fumigations air out you rooms. All you roaches are gone.Franck3

If they are around the sink, I pour boiling water on them

Other small ones are caught in a tissue and flushed away

Big ones will just be bashed to death, but only enough so that they can't move.  Not to the point that their babies are spread out on the floor etc.

See Miss A and Woody

Nobody will support you guys in state of Origin LOL

Go the QLD Cane Toads