Iji is a freeware 2008 video game featuring platform and shooting elements, developed by Daniel Remar using Game Maker over a period of four years. In the game, the player controls Iji Kataiser, a young woman enhanced with nanotechnology, as she navigates a research facility on modern day Earth in the wake of an invasion by the Tasen, an alien species. Awakening after an aerial bombardment, Iji finds herself enhanced with nanotechnology and, learning of the Tasen and their invasion, resolves to convince the aliens' leader to retreat from the planet, guided by her brother Dan via the complex's loudspeaker system. Iji was generally well received. Reviews praised the replay value, the player's ability to guide Iji on different moral paths, and that it was created by a single developer. Iji was first released on . The original version used version 5.3a of Game Maker; a major update, version 1.7, was released in 2017 that used the Game Maker 7.0 framework for better compatibility with recent OSes (e.g. Windows 10, macOs). It also added a sizable amount of new features, including new endings, more plot, a revamped upgrade interface, a new nonlethal skill tree, overhauled graphics, faster walkspeed, changes to the hacking minigame, and more interaction tracking for Iji's actions over the course of the game. Gameplay Iji is described by Remar as System Shock 2 in 2D. Players control the titular character, Iji, a human woman who has been enhanced with nanotechnology following the invasion of Earth by an alien species known as the Tasen. Iji must navigate a research station while being guided by her brother Dan, who communicates via the station's loudspeaker system, in order to convince the aliens' leader to retreat from the planet. Though the game's plot is linear, interactions with non-player characters (NPCs) change according to the player's actions, leading to one of multiple endings. The player's primary choice is between pursuing Iji's goal either as a pacifist, or by engaging in violence against the alien threat. Iji's nanotech energy field functions as a shield, and players begin the game armed with a shotgun. Seven further weapons can be collected throughout the game; including a machine gun, rocket launcher and alien technology like the Shocksplinter weapon. Eight additional weapons can be unlocked by combining the standard firearms using a combining station, depending on her Crack ability. Blue nanofields that function as experience can be