Spider

Classic
0.27_SURVIVAL_TEST: Officially added spiders, the second mob added in Survival Test.

Spiders were originally brown in early development (changed to the current texture because of a suggestion from a user on the TIGSource forums). They did not jump as far (compared to their range in the Beta update) and killing them gave the player 105 points. Their eyes also did not glow; when this properly was added is unknown.

Indev
Feb 19, 2010: Spiders now drop 0 - 2 string upon death.

Alpha
1.0.17: Added spider jockeys - skeletons spawned riding spiders.

Beta
1.2: Spiders were given the ability to climb vertical walls made of any block and could "see" the player through solid blocks to track them down (Creepers used to have this ability before it was transferred to the Spiders).

1.4: Spiders stopped trampling crops, and making step sounds (for the step sounds were much quieter).