Historical Context & Trivia

Underoid is a 2013 Windows release from Fulltime that was presented as a near-future weaponized shooting game, with promotional material describing it as an “Arms in near future war” title rather than a traditional broad-action release.

The available material links the game to FULLTIME and its wider label ecosystem, and the public-facing trailer and trial-version coverage indicate a Japanese-market adult PC production built around a real-time 3D shooting concept.

Gameplay & Technical Features

Underoid is an Action game centered on a third-person shooting structure, with the available description emphasizing real-time 3D gunplay and a futuristic combat setting.

On Windows, the game appears to have relied on 3D polygon character models, a shooting-focused camera system, and presentation choices aimed at delivering a stylized sci-fi battlefield rather than a arcade-conventional action format.

Collector’s Value & Rarity

Underoid is best treated as a niche, low-profile PC release whose preservation interest comes primarily from its specific brand lineage, Japanese regional distribution, and the limited visibility of its documentation online.

Known physical or release-specific collateral in the public record includes a trial version and official promotional video material; no broader evidence in the supplied sources confirms major international packaging variants or wide retail circulation.