Here is the full list of all 12 Virtua Fighter 5 Final Showdown achievements worth 400 gamerscore.
Perform a five-hit combo in Score Attack Mode
Play Score Attack Mode
Complete a test in License Challenge Mode
Play ten ranked matches
Play any training session in Tutorial Mode
Play one ranked match
Face off against Dural in Arcade Mode (any difficulty level)
Win a match in Arcade Mode without losing a round (any difficulty level)
Win a round without taking any damage in Arcade Mode (any difficulty level)
Win a round by knocking your opponent out of the ring in Arcade Mode (any difficulty level)
Complete five tests in License Challenge Mode
Complete ten tests in License Challenge Mode