Journey was PSN's best-selling game in December

Thatgamecompany's downloadable title Journey was December's best-selling PlayStation 3/PlayStation Network title on the US PlayStation Store, with the widely acclaimed adventure buoyed by numerous awards over the holiday season, including GameSpot's Game of the Year award.

As detailed on the US PlayStation Blog, the game jumped up from its 18th-place finish in November. The original Mass Effect, Far Cry 3, PlayStation All-Stars Battle Royale, and The Walking Dead rounded out the rest of December's top five best-selling PlayStation Network and PlayStation 3 titles.

Other notable entries included Monolith's Lord of the Rings MOBA Guardians of Middle-earth at number nine, and Valve's Counter-Strike: Global Offensive (which remains unavailable on the European PlayStation Store four months after launch) in 10th place.

Sony's other big indie title, The Unfinished Swan, which is being sold together with Journey in a retail bundle, did not make the top 20, though cult hit Tokyo Jungle finished at number 12.

Little Big Planet Vita was the best-selling Vita title on PlayStation Store, and the Black Ops II Season Pass was the top-performing PlayStation 3 add-on.

The top 10 in full.

1. Journey
2. Mass Effect
3. Far Cry 3
4. PlayStation All-Stars Battle Royale
5. The Walking Dead - Episode 5: No Time Left
6. Sonic Adventure 2
7. Assassin's Creed III
8. Grand Theft Auto IV
9. Guardians of Middle-earth
10. Counter-Strike: Global Offensive