Dead Or Alive: Dimensions Nintendo 3DS Chats

Geo-Thermal Plant stage Successfully complete Arcade mode to unlock the Geo-Thermal Plant stage.

Bonus characters Successfully complete Chronicle mode, then complete one of the following task to unlock the corresponding Boss character:

Alpha-152: Successfully complete Mission 19 in Tag Challenge mode.
Genra: Successfully complete Mission 18 in Tag Challenge mode.
Kasumi Alpha: Successfully complete Mission 16 in Tag Challenge mode.
Raidou: Successfully complete Mission 20 in Tag Challenge mode.
Shiden: Successfully complete Mission 20 in Tag Challenge mode. To select him, hold L + X and press A on the "Random" option at the character selection screen.
Tengu: Successfully complete Mission 17 in Tag Challenge mode.

Alternate costumes While selecting the listed character at the character selection screen, hold the indicated buttons, then press A to use the corresponding costume:

Kasumi Alpha (braid): Press L + X.
Kasumi Alpha (high ponytail): Press R + X.
Kasumi Alpha (low ponytail): Press L + R + X.
Kasumi (braided hair): Press L + X.
Kasumi (high ponytail): Press R + X.
Kasumi (low ponytail): Press L + R + X.
La Mariposa (no mask): Press L + X.
Lei Fang (side braids): Press L + X.
Lei Fang (short ponytail): Press R + X.
Random select (Shiden costume 1): Press L + X.
Random select (Shiden costume 2): Press R + X.
Random select (Shiden costume 3): Press L + R + X.

Character menu voices Play and win one round in Survival mode to unlock the character menu voices.

Sledding Tina Play as Tina against any opponent on either "Frozen Peaks" or "The White Storm" stage. Get your opponent backed up against the edge of a hill, and execute a throw while pressing in the direction towards your opponent. Instead of the normal scene transition, Tina will throw her opponent face down into the snow, sit on his or her back, and use him or her as her personal sled as she slides down the hill.