Babysitting is a mission for Derrick McReary, Packie's brother in Grand Theft Auto IV. In this mission, Niko and Derrick help a North Korean named Kim Young-Guk smuggle a boat full of counterfeit 100 dollar bills into Liberty City on a boat. This mission introduces the Rocket Launcher, the most powerful explosive weapon in the game. Niko meets Derrick in a boat. He takes Derrick in the boat to Kim Young-Guk, a Korean criminal that is wanted by the police for counterfeiting money. Niko and Derrick follow Kim and use guns to blow up a few boats that want to use Kim's counterfeit money for themselves.
Niko meets Derrick on the pier at Alderney City waterfront. There will be a short cutscene showing Derrick pulling up in a squalo speedboat. After the cutscene you will be at the wheel of the boat with Derrick at which point he tells Niko they need to get to a boat anchored off the northern tip of Alderney. On the way there, Derrick explains the situation, Kim is his Korean contact who is arriving with a boatload of counterfeit $100 bills. He also tells Niko about Aiden O'Malley, who is currently in prison, and a guy who, like Bucky Sligo, thinks Derrick ratted him out to the police and wants him dead.
Upon arriving at Kim's boat, Derrick tells Kim that he will text him the route he is to follow in order to avoid the security checks of entering the city, and that he and Niko would protect him and his boat. As Niko and Derrick follow Kim leading up to the Humboldt River, several enemy boats appear and attack Kim, trying to steal the conterfeit notes. Derrick and Niko immediately start open firing on the attackers, aiming for their engines for easy destruction. When Kim veers east and passes under the East Borough Bridge, that connects Bohan to Charge Island, he picks up another attacker, a helicopter, or as Derrick calls it, the "airbourne cavalry."
Niko then stands on the deck of the speedboat and arms himself with the rocket launcher that is onboard and fires rockets at the helicopter until it is destroyed. Niko then turns his attention to the remaining enemy boats, and starts shooting until every attacker has been eliminated. Once the area is clear from attackers, Niko, with Derrick, follow Kim until he reaches his destination.
Be VERY CAREFUL after you have taken out the helicopter. The boats will all pull up beside you, and killing the driver will blow up their boat, possibly killing you, Derrick, Kim, or "wrecking" Derrick's boat.
In order to complete the mission the player must:
- Go to Kim's boat
- Follow Kim
- Stay close to Kim's boat. Protect him from the attackers
- Use the rocket launcher to shoot down the chopper
- Eliminate every attacker
- Follow Kim
- Kim's attackers - Derrick and Niko protect Kim by destroying attacking boats and a helicopter.