The following must be completed in Tekken 6. You'll reap the rewards in PlayStation Home

Unlockable	How to unlock
Kazuya Gloves	Defeat Kazuya in Scenario Campaign
Tekken 6 Arcade cabinet	Beat Arcade Mode
Tekken 6 Crystal Tee-shirt	Defeat Heihachi Mishima in Scenario Campaign
Tekken 6 Long sleeves Tee-shirt	Complete the Scenario Campaign Mode
Tekken 6 Tee-shirt	Defeat "Container terminal 7" stage in Scenario Campaign