Halo stage
Successfully complete Story mode with Helena to unlock a stage similar to the first stage of Halo 2, the Hangar Area.
Play as Ein
Successfully complete Story mode with Hitomi to unlock Ein in all modes except for Story mode.
Play as Gen Fu
Successfully complete Story mode with Eliot to unlock Gen Fu in all modes except for Story mode.
Play as Helena
Successfully complete Story mode with all sixteen characters to unlock Helena in all modes.
Play as Leon
Successfully complete Story mode with Zack to unlock Leon in all modes except for Story mode.
Play as Spartan-458
Successfully complete Story mode with Helena to unlock Spartan-458 from Halo in all modes except for Story mode.
Play as Tengu
Successfully complete Time Attack mode with all default and hidden characters to unlock Tengu.
Increased bounciness
Enter “99” as your age in your profile to make the female characters’ breasts bounce more than usual.
Bonus system announcer voices
In the options menu, you can choose different voices for the system announcer. To unlock additional voices, enter Sparring mode and bring up the sparring menu. Select “Exercise” and you will be prompted to run through an extensive moves list. Successfully complete the moves list to unlock that character’s voice as a system announcer.
Alternate character appearance
At the character selection screen, press A to select a character, then press X, Y, or Start. Press A to start the match with the alternate appearance. Note: Not all characters have an alternate version.
Alternate costumes
Successfully complete Story mode to unlock an alternate costume with the following characters. If available, the next alternate costume for that character will be unlocked when Story mode is completed with them again.
Ayane C3, C4, C5, C6
Bass C3, C4
Bayman C3
Brad Wong C3
Christie C3, C4
Elliot C3, C4
Hayabusa C3, C4
Hayate C3, C4
Helena C3, C4 C5
Hitomi C3, C4, C5, C6, C7, C8
Jann Lee C3, C4
Kasumi C3, C4, C5, C6, C7
Kokoro C3, C4, C5, C6, C7
La Mariposa C3, C4, C5
Leifang C3, C4, C5, C6, C7
Tina C3, C4, C5
Zack C3, C4
Successfully complete Time Attack mode on the default settings to unlock an alternate costume with the following characters. If available, the next alternate costume for that character will be unlocked when Time Attack mode is completed with them again.
Ein C3, C4
Genfu C3, C4
Leon C3, C4
Spartan-458 C3, C4, C5, C6, C7
Hidden goof rewards
Some of the game’s secrets shown in the achievements list are actually goof rewards. These vary from Loss Streaks to Rank Demoting.
Easy wins with Jann Lee
First, try to land a critical punch or kick to the enemy’s head. If not accomplished, make use of quick countering or blocking to land a firm blow. Then when your enemy is hit off balance for a few seconds, keep throwing random critical blows to the head region mainly, and mix it up slightly to the body and legs. If you can do this and include fast combos in between your rhythm, you should be able to keep the enemy off the ground desperate for making successful blows. You should be able to do this technique with simple combos. Make sure that your rhythm is broken, meaning attack at different times without staying in a similar pattern and keeping your blows mostly critical. If you can do this a lot, you should also be able to switch it up with fast combos making it almost impossible for your opponent to counter. Remember to execute critical blows to the head mainly, mixed with fast combos and quick blows to the body. Keep your rhythm broken so it is impossible to counter (no repetition or repeating the speed of blows), and make sure to keep your guard up. Do not allow the enemy to hit you unexpectedly, or they may confuse you with the same trick. Try to at least counter when you lose balance in the match.
Halo reference
Select Spartan-458 and play on the Gambler’s Paradise stage. During the match, a Warthog with Marines will appear on the road.
Biolab Core stage
Successfully complete Story mode to unlock the Biolab Core stage.
Nassau Station stage
Successfully complete Story mode with Helena to unlock a stage similar to the first stage of Halo 2, the Hangar Area.
Tatami Mat stage
Unlock all costumes and system voices and successfully complete Story mode with all seventeen characters to unlock the Tatami Mat stage, which has a floor mat with no walls.
Theater mode
Successfully complete Story mode with any character to unlock Theater mode and their movie. More movies can be unlocked by completing Story mode with different characters.
Easy Time Attack Achievements
To easily accomplish the Time Attack Achievements (Bronze, Silver, and Gold), go into “Settings”, then “Game Settings”, and change the “Time Attack Mode Match Points” to “1” instead of the default of “2”. By doing this, you will only have to defeat each opponent once instead of twice. Note: Costumes cannot be unlocked and your score will not be on the leaderboard unless it is under the default settings.