All missions, side missions and stunt jumps need to be completed in order to fully complete the video game Grand Theft Auto IV. There are 50 achievements total, which are required for 100% completion. It is estimated that it will take a player 100 hours or more to complete the game.Kotaku: GTA IV Takes 100 Hours To Complete (Feb 29, 2008)

1. Complete 90 Story and Procedural missions: 68%
2. 30 car thefts: 2%
3. 50 stunt jumps: 2.5%
4. Collect 200 pigeons (flying rats): 2.5%
5. Locate random characters, complete their missions: 5%
6. Complete 20 crimes in vigilante: 2.5%
7. Kill all 30 people on the list: 2.5%
8. Beat friends or computers at each activity: 5%
9. Get all friend's special abilities and do all their activities (not including Dwayne or Roman): 10%

Grand Theft Auto IV is the ninth game in Rockstar Games' popular long-running franchise. The games are infamous for their violent, anarchic spirit and gleefully amoral content. In GTA IV, recent Eastern European immigrant Niko Bellic moves to America's Liberty City (based on New York City) to start a new life. He winds up working for his cousin Roman's taxi company, which is really a front for all manner of criminal enterprises. Though the actual navigable area of Liberty City is a bit smaller than that of the previous GTA game, Grand Theft Auto: San Andreas, the graphics have been improved and the game has been made more interactive.

• Kotaku: GTA IV Takes 100 Hours To Complete (Feb 29, 2008)

• Videogamer.com: Gta 4 Will Take Roughly 100 Hours to Finish (Feb 28, 2008)

• MyCheats: Grand Theft Auto IV Get 100% Completion (Xbox 360)

• GameFAQs: Grand Theft Auto IV "100" Topic Search (Xbox 360) | PS3 | PC

• IGN: Getting 100 percent completion in GTA IV (Time 02:02)