This is a list of Doa3.1 true combos. Note that all moves with a ( ) in a string are the true combos.
:kasumi
P 2 in 1 on normal blow and counter blow
PP 4 in 1 on normal blow
PP 3 in 1 on normal blow
P(K:K) 2 in 1 on normal blow
P 2 in 1 on crouching opponent
P:K 2 in 1 on crouching opponent
:3bK 2 in 1 on crouching opponent
:hayabusa
P 2 in 1 on normal blow and counter blow
P(P) 2 in 1 on Counter/high counter blow
PP 3 in 1 on crouching opponent
:hitomi
P 2 in 1 on normal blow and counter blow
P(6) Non holdable
P(K) 2 in 1 on all blow types
P(:2bK) 2 in 1 on normal blow
P 2 in 1 on normal blow
K:K 2 in 1 on normal blow
:zack
P 2 in 1 on normal blow and counter blow
:3bP 2 in 1 on crouching opponent
K:K(K) 2 in 1 on normal blow
:2bK(K) 2 in 1 on normal blow
K2b:k(K) 2 in 1 on normal blow
:genfu
P 2 in 1 on normal blow and counter blow
PP 2 in 1 on normal blow
+:K(P) 2 in 1 on all blow types
:brad
P 2 in 1 on normal blow and counter blow
P 2 in 1 on (high)Counter blow
:tina
P 2 in 1 on normal blow and counter blow
6P 2 in 1 on crouching opponent
6(P) 2 in 1 on crouching opponent
6(K) 2 in 1 on crouching opponent
:3bP 2 in 1 on crouching opponent
:bass
P 2 in 1 on normal blow and counter blow
P 2 in 1 on counter blow(within closed stance)
P 2 in 1 on normal blow
:leon
P 2 in 1 on normal blow and counter blow
6 2 in 1 on normal blow
PP 3 in 1 on normal blow
P 2 in 1 on normal blow
PK 2 in 1 on normal blow
:bayman
P 2 in 1 on normal blow and counter blow
P 2 in 1 on normal blow
:k(P) 2 in 1
k 2 in 1
:jann
P 2 in 1 on normal blow and counter blow
P 3 in 1 on normal blow
:lei
P 2 in 1 on normal blow and counter blow
3 2 in 1 on normal blow and counter blow
:christie
P 2 in 1 on normal blow and counter blow
P 2 in 1 on normal blow
P:K 2 in 1 on normal and counter blow
:helena
P 2 in 1 on normal blow and counter blow
P:K 2 in 1 on (high)Counter blow (within closed stance)
P 2 in 1 on crouching opponent
P:K 2 in 1 on crouching opponent
:hayate
P 2 in 1 on normal blow and counter blow
P 2 in 1 on all blow types
P 2 in 1
:ayane
P 2 in 1 on normal blow and counter blow
+P 2 in 1 on normal blow
:ein
P 2 in 1 on normal blow and counter blow
P 2 in 1 on normal blow
:kasumi
P 2 in 1 on normal blow and counter blow
PP 4 in 1 on normal blow
PP 3 in 1 on normal blow
P(K:K) 2 in 1 on normal blow
P 2 in 1 on crouching opponent
P:K 2 in 1 on crouching opponent
:3bK 2 in 1 on crouching opponent
:hayabusa
P 2 in 1 on normal blow and counter blow
P(P) 2 in 1 on Counter/high counter blow
PP 3 in 1 on crouching opponent
:hitomi
P 2 in 1 on normal blow and counter blow
P(6) Non holdable
P(K) 2 in 1 on all blow types
P(:2bK) 2 in 1 on normal blow
P 2 in 1 on normal blow
K:K 2 in 1 on normal blow
:zack
P 2 in 1 on normal blow and counter blow
:3bP 2 in 1 on crouching opponent
K:K(K) 2 in 1 on normal blow
:2bK(K) 2 in 1 on normal blow
K2b:k(K) 2 in 1 on normal blow
:genfu
P 2 in 1 on normal blow and counter blow
PP 2 in 1 on normal blow
+:K(P) 2 in 1 on all blow types
:brad
P 2 in 1 on normal blow and counter blow
P 2 in 1 on (high)Counter blow
:tina
P 2 in 1 on normal blow and counter blow
6P 2 in 1 on crouching opponent
6(P) 2 in 1 on crouching opponent
6(K) 2 in 1 on crouching opponent
:3bP 2 in 1 on crouching opponent
:bass
P 2 in 1 on normal blow and counter blow
P 2 in 1 on counter blow(within closed stance)
P 2 in 1 on normal blow
:leon
P 2 in 1 on normal blow and counter blow
6 2 in 1 on normal blow
PP 3 in 1 on normal blow
P 2 in 1 on normal blow
PK 2 in 1 on normal blow
:bayman
P 2 in 1 on normal blow and counter blow
P 2 in 1 on normal blow
:k(P) 2 in 1
k 2 in 1
:jann
P 2 in 1 on normal blow and counter blow
P 3 in 1 on normal blow
:lei
P 2 in 1 on normal blow and counter blow
3 2 in 1 on normal blow and counter blow
:christie
P 2 in 1 on normal blow and counter blow
P 2 in 1 on normal blow
P:K 2 in 1 on normal and counter blow
:helena
P 2 in 1 on normal blow and counter blow
P:K 2 in 1 on (high)Counter blow (within closed stance)
P 2 in 1 on crouching opponent
P:K 2 in 1 on crouching opponent
:hayate
P 2 in 1 on normal blow and counter blow
P 2 in 1 on all blow types
P 2 in 1
:ayane
P 2 in 1 on normal blow and counter blow
+P 2 in 1 on normal blow
:ein
P 2 in 1 on normal blow and counter blow
P 2 in 1 on normal blow