Java Edition pre-Classic rd-131655

Cave game tech test&#8202; is the name of a video released by Notch on May 13, 2009. While the version shown was never publicly available to play, it was developed from May 10, 2009, and showcased on May 13, 2009. It is the first known version of Minecraft, or Cave Game, as it was referred to in this time period.

General

 * Physics
 * Lighting
 * Chunks
 * World generation
 * 256x64x256 tile map.
 * Caves
 * Reached down until a few blocks before the last layer of cobblestone, making a ravine.
 * Creative mode
 * This was an extremely basic version of it. The player could not fly or place blocks and there was no inventory or hotbar to get them from.

Entities

 * The player
 * Currently have no visible model.
 * Have a height of 1.7 meters (5 ft 7 in).

Blocks

 * Air (not listed internally as a block at this time).
 * Cobblestone
 * Made with the same graphics from Notch's game RubyDung.
 * Grass block
 * Made with the same graphics from RubyDung.
 * Only grows on lit tiles.

Changes in the Cave Game code
The Cave Game Tech Test code was edited multiple times during the time it was developed. Here is a list of all known edits to the code:

10th of May, 2009: Game created

12th of May, 2009: Fixed a performance issue

13th of May, 2009 (16:41 GMT): Notch made it only update two chunks per frame. The game generates blank chunks and the FPS is inaccurate.

13th of May, 2009 (16:48 GMT): Game now runs smoother (78fps, 288 chunk updates)

13th of May, 2009 (16:51 GMT): Chunks have been changed from 8x8x8 to 16x16. This was the build that Notch showcased on his youtube channel.