An Atari 2600 adaptation of AdventureGame, created by WarrenRobinett.
http://www.warrenrobinett.com/adventure/
Since the 2600 didn't have text capabilities, certain aspects of the game had to be adapted in ways that would work on the 2600. Objects can be taken and dropped, though only carried one at a time. There are obstacles like locked doors, and puzzles like mazes. And there were creatures such as the dragons and bats.
Objects in the game included:
This game is credited with the following video game innovations:
The most remarkable thing is the functionality squeezed into such a small space: The total memory used by the game program was 4096 bytes (4K) for the game code (in ROM) and 128 bytes for program variables (in RAM). The processor used was a 1.2 MegaHertz?, 8-bit processor (6502).
http://www.atariage.com/software_page.html?SoftwareLabelID=1
"Adventure Game Shrine:" http://www.toadstool.net/games/adventure/ (Includes disassembled source and...)
April 21, 1997 interview with WarrenRobinett: http://www.toadstool.net/games/adventure/interview1.htm
Another interview: http://thejadedgamer.net/interview_warrenrobinett.shtml
Flash version: http://www.simmphonic.com/programming/flash.htm#
Review: http://www.gamingworldx.com/features/CGOTWAdventureAtari2600.shtml
More Sites: http://www.sproat.net/jeremy/atari2600/