Jack Bros.

Jack Bros. follows the three Jack brothers – Jack Frost, Jack Lantern and Jack Skelton – who have traveled from the fairy world to the human world through a portal that opens every year on Halloween. Losing track of time, they spend too much time in the human world, and forget about returning until there only is one hour left to the portal's closing; the fairy Pixie shows them a shortcut, which, while dangerous, is the only way to return to the portal in time.

The player picks one of the three brothers to play as; Pixie can also be unlocked as a playable character. They traverse six areas within a time limit to make it back to the fairy world in time. The areas all consist of a number of floors; the player needs to collect all keys on each floor, before being allowed to jump down to a lower floor. To find the keys, the player uses a radar that displays their locations; once all have been collected, it shows the location of the exit. Once the player reaches the bottom floor, they are faced with a boss character they need to defeat, after which they can proceed to the next area.

Jack Bros. was developed and published by Atlus for the Virtual Boy, and was released on September 29, 1995 in Japan, and October 1995 in North America. According to Nintendo Power, Atlus did not reveal any details about the game's development, although it is known that it initially was planned to be titled Devil Busters. It is a spin-off from Atlus' Megami Tensei series, and the first entry to be released outside Japan. Being a Virtual Boy title, it made use of the system's stereoscopic 3D to display conventional 2D graphics in monochrome red and black visuals, and a graphics technique called parallax scrolling, to create a 3D effect.

On May 14, 2026, Jack Bros. was re-released for the first time via the Nintendo Classics service.

From contemporary reviews, Nintendo Power praised the games graphics and pacing, noting that it was "more challenging than you might expect" while critiquing the in-game text as "poor". In Famitsu, the four reviewers each gave it a score of five, four, six and five out of a potential ten. They found the gameplay relatively fun but plain and that the 3D effect did not enhance the game, with three of the reviewers saying this could have easily been a Game Boy game.

Jack Bros. was well received in retrospective reviews, with multiple critics calling it one of the best games on the platform. Some thought it was held back by the platform, and that it should be made available on other platforms, such as the Nintendo 3DS. In 2003, the staff at Tips & Tricks stated it to be the most uncommon North American Virtual Boy release, giving it a rarity rating of 6/10 based on a consultation with Digital Press.