
Angelique is a Japanese media franchise based on the video game series. Currently, the series has only been released in Japan, with the exception of a Chinese PC version of the first game in the series. It is somewhat popular with overseas import gamers, who have started petitions in the hopes of English-translated releases of various games in the series. KOEI mentioned in an issue of Newtype USA that it is a possibility if enough demand is shown.

Attack on Titan , known in PAL regions as A.O.T.: Wings of Freedom, is an action hack and slash video game based on the animated series Attack on Titan, which is based on the Hajime Isayama's manga series of the same name, released for PlayStation 3, PlayStation 4, and PlayStation Vita in Japan. It was released on February 18, 2016, in Japan. On April 7, Koei Tecmo announced a Western release in North America and Europe for August 2016. Microsoft Windows and Xbox One versions were also revealed. On March 20, 2018, Attack on Titan 2, the game's sequel, was released worldwide.

Bomb Jack is a platform game released in arcades in 1984 by Tehkan. It was followed by two official sequels, the console and computer title Mighty Bomb Jack, and the arcade game Bomb Jack Twin and Bomb Jack II, which was licensed for home computers only.

La Corda d'Oro is a role-playing game series targeted at a female demographic audience under the Neoromance series from Koei. The title is Italian for The Golden String.

Dead or Alive Xtreme Beach Volleyball is a beach volleyball game by Tecmo released in 2003 exclusively for the Xbox. The game was a departure from the rest of the Dead or Alive series which otherwise consisted of fighting games. It also marked the first game in the series to have a Mature rating from the Entertainment Software Rating Board.

Dragon Quest Heroes: The World Tree's Woe and the Blight Below is a hack and slash game developed by Omega Force and published by Square Enix. It was released for PlayStation 3 and PlayStation 4 in Japan in February 2015, and in North America, Australia and Europe only for PlayStation 4 in October 2015. It was later released for Microsoft Windows in December 2015. The game received generally positive reviews, with a sequel Dragon Quest Heroes II being released in Japan during May 2016. Dragon Quest Heroes would later be released with the sequel in a compilation for Nintendo Switch in Japan.

Dynasty Warriors is a series of hack and slash action video games created by Omega Force and Koei. The series is a spin-off of Koei's turn-based strategy Romance of the Three Kingdoms series, based loosely around the Chinese historical text Records of the Three Kingdoms, from which it derives its name in Japanese.

Dynasty Warriors: Gundam, originally released in Japan as Gundam Musou , is a video game based on the Gundam anime series. It was developed by Omega Force and published by Bandai Namco Games. Its gameplay is derived from Koei's Dynasty Warriors and Samurai Warriors series. The "Official Mode" of the game is based primarily on the Universal Century timeline, with mecha from Mobile Suit Gundam, Mobile Suit Zeta Gundam, and Mobile Suit Gundam ZZ appearing in the game, as well as a few units from Mobile Suit Variations Mobile Suit Gundam 0080: War in the Pocket and Mobile Suit Gundam 0083: Stardust Memory appearing as non-playable ally and enemy units. The "Original Mode" of the game also features mecha from the non-UC series Mobile Fighter G Gundam, Mobile Suit Gundam Wing and Turn A Gundam. A newly designed non-SD Musha Gundam designed by Hajime Katoki is also included.

Fist of the North Star: Ken's Rage, originally released in Japan as Hokuto Musou , is a 3D beat 'em up for the PlayStation 3 and Xbox 360 developed and published by Tecmo Koei. It is a spin-off of the Dynasty Warriors series based on the manga franchise Fist of the North Star by Buronson and Tetsuo Hara. It was first released in Japan on March 25, 2010, and it was released in North America on November 2, 2010 and in Europe on November 5. A sequel was announced with a surprise trailer at the Electronic Entertainment Expo in June 2012. New playable characters and story arcs are featured, and the game was released in Japan on December 2012.

G1 Jockey is a video game franchise developed and published by Koei that simulates horse racing from a jockey's perspective. Matthew McCudden had dominated the game for close to 20 years and is widely regarded as the best virtual jockey of all time. Games have been released on the PlayStation, PlayStation 2, PlayStation 3 and also on the Wii.

Gallop Racer (ギャロップレーサー) is a series of horse racing video games, created by Tecmo. Originally for the Arcades, it is available on the PlayStation, PlayStation 2, and PC platforms. Thus far, there have been eight editions released in Japan, six in North America and two in Europe. The games in the series include:Gallop Racer (Arcade/PlayStation) Gallop Racer 2 -ONE AND ONLY ROAD TO VICTORY- (Arcade/PlayStation) Gallop Racer 3 -ONE AND ONLY ROAD TO VICTORY- Gallop Racer 2000 Gallop Racer 5 Gallop Racer 6 -Revolution- Gallop Racer: Lucky 7 Gallop Racer 8 -Live Horse Racing- Gallop Racer Inbreed Gallop Racer ONLINE Champion Jockey: G1 Jockey & Gallop Racer Gallop Racer

Kessen is a real-time tactics video game produced by Koei and published by Electronic Arts. It was a launch game for the PlayStation 2 in Japan and North America. It was initially the only real-time wargame game available for the PlayStation 2.

Monster Rancher, known in Japan as Monster Farm , is a Japanese media franchise and series of life simulation role-playing video games created by Tecmo. The series consists of fourteen games across different video game platforms. The series has been adapted into an anime. A remaster of the first installment is planned to be released in Japan in 2020.

Nobunaga's Ambition is a series of turn-based grand strategy role-playing simulation video games. The original game was one of the first in its genre, being released in March 1983 by the Japanese video game developer Koei. Nobunaga's Ambition takes place during the Sengoku period of feudal Japan. The player is tasked with achieving the ultimate goal of warlord Oda Nobunaga: the conquest and unification of Japan. Selecting Oda Nobunaga is optional, however, as the player is also able to choose from a variety of other regional daimyōs of the time.

One Piece: Pirate Warriors also known in Japan as One Piece: Kaizoku Musou , is a series of action-adventure video games developed by Omega Force and published by Bandai Namco Entertainment. It is based on the One Piece manga and anime franchise by Eiichiro Oda. It is the most successful One Piece video game series. It has sold over 4 million copies.

One Piece: Pirate Warriors is an action video game developed by Omega Force and published by Bandai Namco Games for PlayStation 3. It was released on March 1, 2012, in Japan, September 21, 2012, in Europe and September 25, 2012, in North America. The game was developed in commemoration of the 15th anniversary of the One Piece manga and anime franchise by Eiichiro Oda. Pirate Warriors was also the first title in the One Piece video game franchise which was released on a PlayStation system since One Piece: Grand Adventure in 2006.

P.T.O., released as Teitoku no Ketsudan (提督の決断) in Japan, is a console strategy video game released by Koei. It was originally released for the PC-9801 in 1989 and had been ported to various platforms, such as the X68000, FM Towns, PC-8801 (1990), MSX2 (1991), Sega Genesis and the Super NES. Players could assume one side of the Pacific Theater of Operations during World War II, acting as naval commander, organizing fleets, building new ships, appropriating supplies and fuel, and even engaging in diplomacy with other countries. The player can choose one of several World War Two battles to simulate, or could control the entire Pacific campaign well before the Japanese attack on Pearl Harbor.

Rakushou! Pachi-Slot Sengen is a series of pachi-slot simulation games from Tecmo primarily for the PlayStation 2. While early games in the series featured several of Tecmo's real-life gambling machines, the fifth and sixth games focused on the Rio line of machines, as well as their star, Rio Rollins Tachibana, a character who later appeared in the 2010 Dead or Alive Paradise game, starred in the 2011 anime television series Rio: Rainbow Gate!, and appeared playable in the 2017 action game Warriors All-Stars.

Romance of the Three Kingdoms is a series of turn-based tactical role-playing simulation grand strategy wargames produced by Koei. Originating from Japan in 1985, fourteen installments of the game have been published in Japan, Taiwan, China, South Korea and North America to date. While the game's title as it was released in English refers to the 14th century historical novel Romance of the Three Kingdoms (三國演義) by Luo Guanzhong, the title as it was released in Japan and Chinese regions refers to the 3rd century historical text Records of the Three Kingdoms (三國志) by Chen Shou.

Samurai Warriors is the first title in the series of hack and slash video games created by Koei's Omega Force team based closely around the Sengoku period of Japanese history and it is a sister series of the Dynasty Warriors series, released for the PlayStation 2 and Xbox in 2004. A port of this game called Samurai Warriors: State of War has been released for the PlayStation Portable, which includes additional multiplayer features.

Taikō Risshiden V is the latest title of a Japanese video game series Taikō Risshiden produced by Koei. It was released on PC and PlayStation 2 in 2004 followed by a port to PlayStation Portable in 2009. The first title of the series was released on NEC PC-9801 in 1992 followed by ports to Super Famicom and Genesis/Mega Drive. It was later re-released on the Wii Virtual Console on September 1, 2009, ported from the Super Famicom version.

Tecmo Bowl is an American football video game developed and released by Tecmo. Originally released as an arcade game in 1987, the game featured a large dual screen cabinet and allowed up to four players to compete in a match between two fictitious teams. A port for the Nintendo Entertainment System was released in 1989 and was the first console game to include real NFL players, via a license from the NFLPA. A Game Boy version developed by Sculptured Software followed in 1991. The NES version of the game was extremely popular, spawning various sequels, starting with 1991's Tecmo Super Bowl. The NES game has also been cited by various media outlets as one of the best sports video games ever made. Both the NES and arcade versions have also been re-released for various platforms, including mobile phones, the Virtual Console, the NES Classic Edition and Nintendo Switch.

Tecmo NBA Basketball is a basketball video game that was released by Tecmo for the Nintendo Entertainment System.

Tokobot, later released in Japan as Karakuri , is a platformer puzzle game developed and published by Tecmo for the PlayStation Portable in 2005. An expanded version was later released for the PlayStation 2, titled Tokobot Plus: Mysteries of the Karakuri in North America, Europe and Australia and Korobot Adventure in Japan.

Top Management is a multiplatform business simulation video game that turns the player into a highly respected corporate title holder.

Toukiden: The Age of Demons is an action role-playing game developed by Omega Force for the PlayStation Portable and PlayStation Vita. It was released on June 27, 2013 in Japan. Tecmo Koei Games showcased the PlayStation Vita version of the game at E3 2013, and released the game within North America on February 11, 2014 exclusively on PlayStation Vita. A sequel titled Toukiden 2 was released in 2016 on the PlayStation 3, PlayStation 4 and PlayStation Vita.

Warriors Orochi is a beat 'em up video game for PlayStation 2 and Xbox 360, developed by Koei and Omega Force. It is a crossover of two of Koei's popular video game series, Dynasty Warriors and Samurai Warriors and the first title in the Warriors Orochi series.

WinBack is a third-person shooter video game developed by Koei's Omega Force studio for the Nintendo 64 in 1999 and PlayStation 2 in 2000-2001. A second game with no related storyline, WinBack 2: Project Poseidon, produced by Cavia for the PlayStation 2 and Xbox game consoles, was released on April 25, 2006.

Winning Post is a thoroughbred horse racing simulation game series from Koei Tecmo debuting in 1993. The series is distinct from Koei's other horse-racing franchise, G1 Jockey, and Tecmo's Gallop Racer series. To date, the only version of the game to be released outside of Japan was the Sega Saturn port of Winning Post EX, released in North America as Winning Post. All of the other games have only been released in Japan.