Video Pinball
Atari releases Video Pinball as a cartridge for the Atari 2600. Though sharing the same name as an earlier Atari arcade game, the home edition is a somewhat more elaborate simultaion of pinball.
Adventure
Atari releases the Adventure cartridge for the Atari VCS home video game system. Designed and programmed by Warren Robinett, Adventure is the first of its kind – a VCS game with a playing field larger than the TV screen, mapped out in the program’s memory – but later becomes better remembered for one “room” in the game’s maze which contains the programmer’s name, one of the earliest video game “Easter eggs.”
Night Driver
Atari releases the home version of Night Driver as a cartridge for the Atari 2600. This game is one of the few to use the console’s “paddle” controllers.
Space Invaders invade homes
Atari releases the home version of Space Invaders as a cartridge for the Atari 2600, the first time that a video game company has licensed another company’s game for home play. (All of Atari’s arcade ports up to this point have been home versions of Atari arcade games.) It turns out to be an astute move: Space Invaders is the “killer app” of the VCS, becoming so popular that the cartridge boosts sales of the system needed to run it.
More about Atari 2600 in Phosphor Dot Fossils
Hear about it on the Sci-Fi 5 podcast
Activision founded
Fed up with Atari’s refusal to grant them bylines on the best-selling games they’ve been designing and programming for the Atari VCS, Atari employees Alan Miller, David Crane, Larry Kaplan and Bob Whitehead quit their jobs and form the first third-party video game software house, Activision, with former music executive Jim Levy aboard as the new company’s CEO. Infuriated, Atari files a raft of lawsuits alleging theft of trade secrets, but is ultimately unable to get an injunction preventing Activision from releasing games for the VCS.
Superman
Atari releases Superman as a cartridge for the Atari 2600. This is the first major synergy between Atari and fellow Warner Communications unit DC Comics, riding on the renewed interest in the character generated by the 1978 movie.
More about Atari 2600 in Phosphor Dot Fossils
Hear about it on the Sci-Fi 5 podcast
Slot Machine
Atari releases the Slot Machine cartridge for the Atari VCS, designed and programmed by future Pitfall! programmer David Crane.
Atari releases the Basketball
Atari releases the Basketball cartridge for the Atari VCS, one of the earliest home video games to show a vaguely 3-D perspective, and probably the best-known early sports game in the console’s library.
Atari releases the baseball cartridge 
Atari releases The Video Computer System
The Atari Video Computer System, model number CX2600, hits retail stores in the United States, primarily through a deal with Sears (which has a contractual right to repackage it as the Sears Video Arcade). Packaged with two joysticks, a pair of paddles, and the two-player-only tank game Combat, the VCS isn’t quite a runaway success, with only a quarter million units selling by Christmas 1977.