Here is the full list of all 10 SNK VS. CAPCOM: THE MATCH OF THE MILLENNIUM achievements.
Earn a medal in every Olympic game
Win at least once in each of Tournament's My One, My Tag, My Team
Unlock Akari
Unlock Yuri
Unlock Akuma
Unlock Baby Bonnie Hood
Unlock Geese Howard
Unlock Orochi Iori
Unlock M. Bison
Unlock Evil Ryu