The current version of the game is called Noctis IV. In the release of Noctis IV, Alex included a facility to have planet names and notes sent back to him and then compiled into a central database of information called the GUIDE. People playing the simulator (also called Stardrifters) could then share their findings with others, and a community of explorers soon developed (on the Noctis forums) around that, vying for a wide range of discoveries, such as the planetary system with the most planets or the biggest tree in the Noctis universe. This is currently the only way to interact with other players.
For some time Alex regularly compiled a new GUIDE based on emailed submissions of players of their "Outbox" and allowed the compilation to be downloaded as an "Inbox"; the GUIDE has not been updated for several years since 2005, but since December 2008 the service has been restored again.[2] A more automatic system of "massively single-player" content sharing is used.

The team at Double Fine kindly filmed a video covering the reasons behind their choice of Moai and showing some of the very earliest Double Fine Adventure development prototypes.

The native language of video games is neither spoken nor written

Nomic is a game created in 1982 by philosopher Peter Suber in which the rules of the game include mechanisms for the players to change those rules, usually beginning through a system of democratic voting.

For each of the dungeons, the critical path is almost always linear. There are very few instances where the player is required to re-traverse ground she's already seen. The only exception to the linearity rule tends to be two or three rooms at the beginning of the dungeons that allow you to choose between a small subset of rooms.

Players all over the world played to save GlitchHiker from extinction and failed: GlitchHiker is a game that has gone extinct. Every successful attempt at collecting more than a hundred points restored the games’ system resources globally and every failure slowly destroyed it.

As the game system withered, increased amount of glitches appeared in the graphics, music, controls and gameplay. As soon as the game would run out of its resources, it would go extinct and become permanently unplayable, not just for that player or for a limited time – it would go extinct for everyone and forever.