I, Robot is an action video game designed by Dave Theurer of Atari, Inc.. It was released by Atari as an arcade video game in 1984. The player assumes the role of "Unhappy Interface Robot #1984", a servant bot that rebels against Big Brother. The goal is to turn red squares to blue to destroy Big Brother's shield and eye. In addition to the main game, there is a non-game drawing mode, Doodle City, which can be used for three minutes.

I, Robot was the first arcade video game to be rendered entirely with 3D polygon graphics at runtime. Some earlier 3D games used vector graphics instead of rasterized polygons, such as Atari's Tempest from 1981, also by Theurer. Funai's laserdisc game Interstellar (1983) had previously used pre-rendered 3D graphics, and Simutrek's Cube Quest (1983) used real-time 3D graphics combined with laserdisc full-motion video backgrounds. I, Robot was also the first video game with camera-control options.

The game received mixed reception and was a financial flop. Approximately 750–1000 arcade machines were manufactured, with few having been confirmed to exist today. The remaining cabinets have become collectibles. I, Robot was retrospectively praised for its innovative 3D graphics, and author David Ellis listed it as one of the "notable classics" of its time.

I, Robot and Return of the Jedi were the last two arcade games from Atari, Inc., before the company was split up and the arcade division renamed to Atari Games. In 2022, the game was included as part of the Atari 50 compilation, marking its first re-release.

In I, Robot, the player controls "Unhappy Interface Robot #1984", a servant robot who has become self-aware and decides to rebel against Big Brother. To advance from level to level, the robot must destroy the giant blinking eye of Big Brother, first by wearing down its shield and then attacking the eye directly. The robot fires energy at the shield by moving over red blocks in the level, converting them to blue.

Although the robot can jump, it is destroyed if jumping while the eye is open. Various extra hazards, such as birds, bombs and flying sharks, can also destroy the robot during each level. At the end of some levels, rather than destroying the eye immediately, the robot must navigate a maze and collect gems before it encounters the eye at close range. Once a level is completed, the robot flies through outer space and must shoot or avoid "tetras", meteors, and various obstacles (including a floating head that fires nails) to reach the next level.

The player can adjust the camera angle during gameplay, moving closer to the robot or flying up for an overhead view of the level. The closer the camera is to the robot, the greater the score multiplier, but the more difficult it is to see the whole level and Big Brother. In later levels, enemies known as "viewer killers" begin attacking the camera directly, forcing the player to either change the viewing angle or move the robot so that the camera will follow it. Failing to avoid a viewer killer costs the player a life.

There are 26 unique levels; after completing all of them, the levels repeat at a higher difficulty and with a different color palette, as in Atari's earlier game Tempest. After completing a total of 126 levels, the player is thrown back to a random earlier level. The game ends when the player runs out of lives.