It's three No.1 chart positions in a row for Rockstar Games' Grand Theft Auto IV. Sales are plummeting each week, down a further 41% this week, but the game is still able to fend of competition from Wii Fit, Mario Kart Wii, Wii Play and Mario & Sonic.

Wii Fit sales are down 52%, while Mario Kart Wii jumps six places to No.3 thanks to renewed stock. SEGA's Mario & Sonic holds at No.4 and Wii Play slips a few places to No.5.

Nintendo continues to dominate the All Formats chart with half the games in the Top 40 exclusive to Nintendo platforms. 28 titles in the Top 40 are selling best on Nintendo platforms.

Although not new releases, there are new entries this week for High School Musical 2: Work This Out! at No.14, EA's Boom Blox at No.21 and Speed Racer at No.37. The only new release to make an impact on the chart is Top Trumps: Doctor Who from Eidos at No.22.

With the highly anticipated PS3 FPS Haze finally hitting stores this Friday expect some serious competition at the top of the chart. Ubisoft's shooter is joined by Rock Band for Xbox 360 and Funcom's Age of Conan which is aiming to become the next big MMO.

Leisure software charts compiled by Chart Track, (C)2001 ELSPA Ltd Entertainment Software (All Prices) Week 20, 2008

1: GRAND THEFT AUTO IV

2: WII FIT

3: MARIO KART WII

4: MARIO & SONIC AT THE OLYMPIC GAMES

5: WII PLAY

6: PRO EVOLUTION SOCCER 2008

7: IRON MAN: THE OFFICIAL VIDEOGAME

8: CALL OF DUTY 4: MODERN WARFARE

9: DR KAWASHIMA'S BRAIN TRAINING

10: GUITAR HERO III: LEGENDS OF ROCK

11: FIFA 08

12: GRAN TURISMO 5: PROLOGUE

13: RAYMAN RAVING RABBIDS 2

14: HIGH SCHOOL MUSICAL 2: WORK THIS OUT!

15: CARNIVAL: FUNFAIR GAMES

16: SONIC RIDERS: ZERO GRAVITY

17: COOKING MAMA 2

18: GAME PARTY

19: IMAGINE: BABIES

20: BEN 10: PROTECTOR OF EARTH