Here is the full list of all 12 THE KING OF FIGHTERS 2002 UNLIMITED MATCH achievements.
Win a total of 30 RANKED MATCH
Win a total of 10 RANKED MATCH
Clear all Expert Challenges
Clear all Normal Challenges
Defeat Ω Rugal and clear TEAM PLAY
Defeat Nameless the challenger
Defeat 30 opponents in ENDLESS
Defeat 65 opponents in ENDLESS
Take the perfect Roaring Sphere using Clark
Get a clean hit with Galactica Vanguard using Ralf (available on Practice Mode)
Defeat 10 opponents in ENDLESS
In TEAM PLAY; defeat any of Krizalid, C.Zero, Zero, or Igniz