Grand Theft Auto 4: The Ballad of Gay Tony Guide - Side Missions
Complete “Momma’s Boy” in the Mom’s House mission line to unlock Cage Fighting. Travel to the fist icon on the map and radar and step through the door in the alley. Downstairs, approach the door, press LB, and press the X button to compete.
Winning the L.C. Cage Fighter’s championship unlocks the “Bear Fight” Xbox 360 achievement. To win the championship, you must survive six rounds; you’ll face three fighters per round, so you must best a total of 18 fighters. Doing so is no easy feat, especially since several of the fighters will bring a melee weapon into the cage.
Punch and kick your way to victory.
The controls are simple: lock-on to your opponent with LT, hold RT to block, use the B and Y buttons to swing your fists, the X button to kick, and the A button to dodge. The first couple of rounds are a cinch, but the difficulty increases dramatically after the third. Sometimes you can get through a round using nothing but kicks (X button), but this method can take awhile.
There are a couple of tricks you can use to your advantage.
One trick involves exploiting a bit of a glitch. When your next opponent is running into the ring, if you can keep him in the hall long enough with kicks, he might glitch into the cage but just stand on the spot once inside, allowing you to effortlessly take him out. You shouldn’t bet on this trick, though, as pulling it off is a bit of a crapshoot, and it is potentially dangerous: if you accidently step out of the cage, you will be disqualified from the match. Even if your opponent hits you out of the cage, you’ll be disqualified (though, curiously, the opposite is not true).
If at the end of a round you’ve lost a lot of health, you can sit out a round as a spectator to refill your health bar. Doing this is very important, especially in later rounds. You can also place a bet on one of the fighters and potentially make a large amount of money. It seems the leaner fighters fare better than the larger ones, though there probably isn’t anything to it.
Spectate between rounds to regain lost health -- and possibly make some quick cash.
Some of the opponents enter the ring with a bat or knife. For these opponents, it’s best to just try and kick them to death rather than potentially giving them an opening by missing a swing. You can disarm these opponents and use their own weapon against them, but attempting to do so is a gamble. To disarm an opponent, you have to first dodge one of their attacks with the A button, and then press the Y or B button to grab the weapon. It’s all about timing, but can be hard to pull off.