NetherRealm's Injustice is the first fighting game to claim top billing in the UK charts since UFC Undisputed 3 last year. It's also publisher Warner Bros.' first chart topper since LEGO Batman 2: DC Super Heroes.

launching in third. The RPG helped boost hardware sales, too, with a 49 percent week-on-week increase in 3DS sales thanks to the launch of the Fire Emblem limited edition blue 3DS XL.

Tomb Raider drops two places to fourth, with Defiance dropping one spot to fifth.

The regular crop of familiar titles fill out the rest of the top 10: FIFA 13 is sixth, Call of Duty: Black Ops II seventh, Luigi's Mansion 2 eighth, Tiger Woods PGA Tour 14 ninth, and Far Cry 3 tenth.

The Top 20 UK chart for the week ending April 20:

1. Injustice: Gods Among Us
2. BioShock Infinite
3. Fire Emblem: Awakening
4. Tomb Raider
5. Defiance
6. FIFA 13
7. Call of Duty: Black Ops II
8. Luigi's Mansion 2
9. Tiger Woods PGA Tour 14
10. Far Cry 3
11. The Elder Scrolls V: Skyrim
12. LEGO Batman 2: DC Super Heroes
13. Assassin's Creed III
14. Skylanders Giants
15. Gears of War: Judgment
16. Sniper: Ghost Warrior 2
17. Need for Speed: Most Wanted
18. God of War: Ascension
19. Sonic & All-Stars Racing Transformed
20. Sleeping Dogs