DS

Mega Man ZXBoss Plushies09/18/06
OntamaramaOntamarama Unlockables12/10/07

Famicom Disk System

The Mysterious Murasame CastleInvincibility08/06/08

PC

CrescendoExtra Menu06/29/09
Nitro Royale ~Heroines Duel~Unlockable Characters08/11/08
Nitro Royale ~Heroines Duel~Unlockable Characters08/12/08
Nitro Royale ~Heroines Duel~Unlockable Ending CG08/11/08
Nitro Royale ~Heroines Duel~Unlocking Character's Sound Test08/11/08
The Last RemnantNew Game +05/20/09
The Orange BoxPortal Steam Achievements02/19/10
The Sagara FamilyUnlocking the Harem Path12/11/07
Wanko to KurasouUnlocking the three extra scenarios06/26/09

PlayStation 2

Atelier Iris: Eternal ManaUnlocking Bonus material07/01/05
Ichigeki Sacchuu!! HoiHoi-SanUnlocking the Omake option.06/20/08
Mega Man Anniversary CollectionMega Man 3 Passwords08/24/04
Mega Man Anniversary CollectionMega Man 4 Passwords08/24/04
Mega Man Anniversary CollectionMegaman 2 Passwords08/23/04
Radiata StoriesMusic Tracks09/21/05
Shadow of the ColossusReminiscence Mode10/25/05
Shin Megami Tensei: NocturneNew Clothes01/10/05
Steambot ChroniclesUnlocking the ???? option on the Title screen05/26/06
Super Robot Taisen ZUnlockable Units10/01/08
Super Robot Taisen: Original GenerationsUnlockable Mecha04/21/09
Super Robot Taisen: Original GenerationsUnlockable Parts04/21/09
Super Robot Taisen: Original GenerationsUnlockable Weapons04/21/09
Zone of the EndersUnlock Versus Mode the Normal Way04/15/05
Zone of the Enders: The 2nd RunnerUnlockable Versus Mode Characters04/19/05

PlayStation 3

Cross EdgeTrophies05/20/09
Ninja Gaiden Sigma 2Chapter Challenge Mode10/01/09
Ninja Gaiden Sigma 2Health Bars10/01/09
Ninja Gaiden Sigma 2Trophies09/29/09
Resonance of FateUnlockable Clothing03/29/10
Soldner-X: HimmelssturmerTrophies12/08/08
Tekken 6Scenario Campaign Mode Unlockables10/27/09
The King of Fighters XIIIUnlockable characters11/28/11

PSP

Disgaea: Afternoon of DarknessUncovering Etna's Room11/02/07
Rengoku: The Tower of PurgatoryUnlockable Pictures in Gallery Mode05/01/05

Saturn

Marvel Super Heroes vs. Street FighterHow to unlock more options.01/03/06
SaturnSkipping the Saturn's start up(JPN/EU)12/23/05
X-Men vs. Street FighterUnlock extra options01/11/06

Super Nintendo

The Legend of Zelda: A Link to the PastThe Lost Woods with Dark World Enemies01/03/04

Wii

Muramasa: The Demon BladeShigurui difficulty09/08/09
Onechanbara: Bikini Zombie SlayersUnlockables12/21/08
The Sky Crawlers: Innocent AcesUnlockables01/19/10

Wii U

NES RemixUnlocking Extra Games12/19/13

Xbox 360

Chaos;Head NoahAchievements06/29/09
ClannadAchievements10/26/10
DeathsmilesAchievements06/07/10
DoDonPachi Dai-Ou-Jou Black Label ExtraAchievements04/08/09
Espgaluda II Black LabelOmake Mode03/18/10
Infinite UndiscoveryAchievements09/02/08
Onechanbara: Bikini Samurai SquadUnlockable Difficulties.06/22/09
Onechanbara: Bikini Samurai SquadView Mode06/24/09
Otomedius GAchievements04/09/09
Raiden Fighters AcesUncovering the secret planes in Raiden Fighters Jet05/13/09
Star Ocean: The Last HopeUnlockable Difficulties.03/09/09
Star Ocean: The Last HopeUnlocking the Secret Dungeon: ''Cave of the Seven Stars''03/10/09