Popular games published by company Irem Corporation

In the Hunt is a horizontal scrolling shooter arcade game by Irem. It was released in 1993 and later ported to the Sega Saturn, the PlayStation and Windows 95 for the PC by Kokopeli.

In The Guardian Legend, the player controls the female guardian of Earth, a "highly sophisticated aerobot transformer". The player's mission is to infiltrate Naju, a large planet-like object which aliens sent hurtling towards the Earth. While inside, the player must activate ten safety devices in order to initialize Naju's self-destruct mechanism and destroy the alien world before it reaches Earth. Five hostile tribes of alien lifeforms are vie for control of territories within Naju,and the player needs to fight through them to successfully activate the switches and escape.

There are a total of seven stages varying from woodlands, wastelands, swamps, temples and cliffs. Each stage begins with the player slashing his way to the end, until he confronts a level boss. The ninja is always armed with the sword Righteous Cloud which can be fluidly used to attack in all directions. Extra weapons include the Swirling Leaf (shurikens), the Bamboo Thunder (bombs), and the Rising Dragon (kusarigama). There are also several powerup items, such as one unleashing multiple ninja ghosts to assist the player.

Ninja Baseball Bat Man is a 1993 beat 'em up developed and published by Irem Corporation in association with its North American division Irem America exclusively as an arcade game. It is the fourth arcade game by IREM to use a belt scroll perspective, following Blade Master, Hook and Undercover Cops.

Timmy and his friend, Jaime go into Timmy's father's lab to watch a movie on the big screen. Little do they know that the big screen is actually a time machine. When Timmy touches the remote they are both sucked into prehistoric times. Now in order to return home they must reclaim a time machine fuse that was stolen by some Neanderthals who go by the name of "The Rockies". The Rockies are also looking to destroy DinoCity, so two dinosaurs named Rex and Tops decide to help out the two human children in their fight against the Neanderthals.

Top-down space shooter in which the player's and his opponent's spacecrafts are at the opposite sides of the screen. Both try to shoot their opponent first while moving left and right. Space debris is floating between both players and blocking the respective shots. Furthermore the energy level for the laser has to be filled to the max in order to reach the other side of the screen (and therefore your opponent).

You have to defend your city with your tank from the approaching enemy tanks.

Unreleased prototype was canned because it tested badly. Also known as Super Spartan X.

Gingateikoku no Gyakushū (銀河帝国の逆襲), released as UniWar S in the United States is a fixed shooter arcade game that was released by Irem in 1980; it runs upon Namco's Galaxian hardware (a Zilog Z80 running at 3.072 MHz). The player must use the two-way joystick to direct a yellow ship left and right (across the bottom of the screen), with a single button to make it fire shots up at the various types of enemies - and the first stage will see it fighting a formation of "Super Mosquitoes", which are worth 20 points apiece. The second stage, which sees a dotted orange line under the ship, will see it fighting a formation of "Hovering Attackers" which are worth 30 points apiece, and the third stage will see it fighting a formation of "Demon Flies", which are worth 40; some of the "Demon Flies" will leave "Spy Aliens" when killed, which will fall down to the bottom of the screen underneath that line, and try to stab the ship from behind. The only way to kill them (for 100 points apiece), is to destroy the "Killer King" when he appears - and the fourth and last unique stage will see the ship fighting a formation of "Rolling Fires", which are worth 50 points apiece and will also occasionally leave "Spy Aliens" behind when killed. After the last unique stage has been cleared, the four-stage cycle will start all over again.

Legend of Hero Tonma is a side scrolling platform game released by Irem to arcades in 1989.

A handheld adaptation of the 1989 Tamtex arcade mahjong solitaire eroge Shisen-shou, removing all eroge elements while adding a new series of pre-made puzzles ("Challenge Mode").