Harboring a Grudge is a mission in the game Grand Theft Auto IV. After speaking to Packie, hop into your car or make use of the waiting sedan, and follow Packie up on the roof to watch the scene. Climb down onto the small structure with the skylight. Then take the stairs down. Take out all the enemies, including those on the boat in the warehouse.

1. Given by Packie
2. Reward: $7500
3. Achievements: None
4. First Packie Mission

1. Use the sniper rifle to take thin out enemy groups.
2. Consider throwing a grenade into the garage to clear out enemies.
3. Use grenades while driving away to take out Italian cars.

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  Packie introduces you to his sister, who seems interested in you. Head to the harbor with Packie to handle some business. Climb to the roof of the warehouse to survey the docks. Follow Packie as he climbs up the side of the building and observe a deal in progress. A boat arrives and meds are off-loaded onto a waiting truck. Steal the truck and escape with the shipment.

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  We found it best to hang out on the right and use the sniper or assault rifle to take most of the guys out from a distance. Once the shooting has stopped, use the mini-building on the right to get down. Proceed slowly towards the garage. There are still gunners inside. Take cover and pop them with the assault rifle. Get in the truck and follow the map to the waypoint. You will be chased by the Italians. Luckily, Packie has provided some grenades that you can drop out of the window when one of them gets too close.