Highest-grossing arcade games

The year's highest-grossing video game was Pac-Man with $1.2 billion in arcade game revenue, three times the box office revenue of the highest-grossing film Star Wars (1977) in five years.^[5]

Best-selling home video games

The following titles were the best-selling home video games in 1981.^[29]

Best-selling home systems

Magazines

• January – Atari computer magazine ANALOG Computing begins 9 years of publication. Most issues include at least one BASIC game and one machine language game.
• November – The British video game magazine Computer and Video Games (C&VG) starts.
• Winter – Arnie Katz and Bill Kunkel found Electronic Games, the first magazine on video games and generally recognized as the beginning of video game journalism.

Business

• New companies: DK'Tronics, Games by Apollo, Gebelli Software, Imagic, Spectravision, Starpath, Synapse Software
• Defunct: APF Electronics

May

• May 6 – David 'mamehaze' Haywood: Legendary MAME programmer

Games

Arcade

• February – Konami releases Scramble, the first side-scrolling shooter with forced scrolling and multiple distinct levels.^[36]
• February – Williams Electronics releases influential scrolling shooter Defender.
• July 9 – Nintendo releases Donkey Kong, which introduces the characters of Donkey Kong and Mario, and sets the template for the platform game genre. It is also one of the first video games with an integral storyline.^[37]
• August – Konami releases Frogger.
• September – Namco releases Galaga, the sequel to Galaxian which becomes more popular than the original.
• October – Frogger is distributed in North America by Sega-Gremlin.
• October 18 – Sega releases Turbo, a racing game with a third-person rear-view perspective.
• October 21 – Williams Electronics releases Stargate, the sequel to Defender.
• October – Rock-Ola's Fantasy is the first game with a continue feature.
• October – Atari, Inc. releases Tempest, one of the first games to use Atari's Color-QuadraScan vector display technology. It was also the first game to allow the player to choose their starting level (a system Atari dubbed "SkillStep").
• November – Namco releases Bosconian, a multidirectional shooter with voice.
• December – Jump Bug, the first scrolling platform game, developed by Hoei/Coreland and Alpha Denshi, is distributed in North America by Rock-Ola under license from Sega.
• Midway releases fixed-shooter Gorf with multiple distinct stages.
• Taito releases abstract, twin-stick shooter Space Dungeon.
• Data East releases the vertically-scrolling isometric maze game Treasure Island.

Console

• Atari, Inc.'s port of Asteroids is a major release for the Atari VCS, and is the first game for the system to use bank-switching.
• Mattel releases Utopia for Intellivision, one of the first city construction games and possibly the first sim game for a console.

Computer

• June – Ultima is released, beginning a successful computer role-playing game series.
• September – Wizardry: Proving Grounds of the Mad Overlord for the Apple II is the first in a computer role-playing franchise that eventually spans eight games.
• IBM and Microsoft include the game DONKEY.BAS with the IBM PC, arguably the first IBM PC compatible game.
• Muse Software releases the stealth action adventure Castle Wolfenstein for the Apple II.
• The Atari Program Exchange publishes Caverns of Mars, a vertically scrolling shooter, and wargame Eastern Front (1941), both for the Atari 8-bit computers. APX also sells the source code to Eastern Front.
• Epyx releases turn-based monster game Crush, Crumble and Chomp!.
• BudgeCo's Raster Blaster sparks interest in more realistic Apple II pinball simulations and is the precursor to Pinball Construction Set.
• Infocom releases Zork II: The Wizard of Frobozz.

Hardware

Arcade

• July – the Namco Warp & Warp arcade system board is released.
• October – the VCO Object, the first arcade system board dedicated to pseudo-3D, sprite-scaling graphics, debuts with the release of Turbo.

Computer

• March 5 – Timex releases the Sinclair Research ZX81 in the UK, which is significantly less expensive than other computers on the market.
• June – Texas Instruments releases the TI-99/4A, an update to 1979's TI-99/4.
• August 12 – the IBM Personal Computer is released for USD$1,565, with 16K RAM, no disk drives, and 4-color CGA graphics.
• Astrovision distributes the Bally Computer System after buying the rights from Bally/Midway.
• Acorn Computers Ltd releases the BBC Micro home computer.
• Commodore Business Machines releases the VIC-20 home computer.
• NEC releases the PC-8801 home computer in Japan.

Handheld

• November – Nintendo's Game & Watch is released in Sweden.
• Microvision is discontinued.