GfK ChartTrack reports that Rockstar's Red Dead Redemption has held on to the UK video game chart No.1 spot, despite a 40 per cent drop in sales.

The gun-slinging sandbox title has been widely reported to be suffering from stock shortages, but managed to fend off the challenge from THQ's UFC 2010: Undisputed. The multi-discipline martial arts brawler had to settle for second place.

It's not such good news for the week's other new releases: SEGA's Alpha Protocol begins at No.13, one better than Activision's Blur which disappoints at No.14. Movie tie-in, Clash of the Titans (the movie's been and gone) sneaks into the Top 40 at No.37.

With SBK X and The Sims 3 Ambitions expansion Friday's highlights, expect the current batch of chart toppers to jostle for position next week.

Leisure software charts compiled by Chart Track, (C)2001 ELSPA Ltd Entertainment Software (All Prices) Week 21, 2010

1. RED DEAD REDEMPTION

2. UFC 2010: UNDISPUTED

3. 2010 FIFA WORLD CUP SOUTH AFRICA

4. JUST DANCE

5. WII FIT PLUS

6. SPLIT/SECOND: VELOCITY

7. CALL OF DUTY: MODERN WARFARE 2

8. PRINCE OF PERSIA: THE FORGOTTEN SANDS

9. LOST PLANET 2

10. WII SPORTS RESORT

11. BATTLEFIELD: BAD COMPANY 2

12. MODNATION RACERS

13. ALPHA PROTOCOL

14. BLUR

15. ALAN WAKE

16. TOM CLANCY'S SPLINTER CELL: CONVICTION

17. SKATE 3

18. SUPER STREET FIGHTER IV

19. GRAND THEFT AUTO EPISODES - LIBERTY CITY

20. JUST CAUSE 2