Super Street Fighter II Turbo HD Remix (X360)

Akuma
Press Down, while having Hsien-Ko highlighted on the player select screen, to reveal Akuma.

Classic Battle Master (10 points)
Complete X Arcade Mode on Hard or Expert Difficulty.

Dan Hibiki
Press Down, while having Donovan highlighted on the player select screen, to reveal Dan.

Evilot
Press Down, while having Morrigan highlighted on the player select screen, to reveal Evilot (Devilot in japan). She is from the Capcom fighting game "Cyberbots".

Get Your Feet Wet (7 points)
Win three Ranked Matches of X or X' Mode.

Meeting People is Easy (7 points)
You joined or hosted a Four Player Match.

Modern Battle Master (10 points)
Complete X' Arcade Mode on Hard or Expert Difficulty.

Playing to Win (15 points)
Win 20 Ranked Matches in X' mode.

Power Made Flesh (6 points)
Play as Akuma in any mode.