Russell Meakim (TheCastle)

Russel Meakim a.k.a. The Castle or variations thereof is a level designer and former Ritual Entertainment and Nerve Software employee who designed the No Rest for the Living episode for Doom II's Xbox 360 port along with Arya Iwakura (Squibbons) (formerly known as Richard Heath). His most well-known previous work included 4 maps in Counter-Strike: Condition Zero Deleted Scenes.

The Castle designed most of the first half (excluding Level 2) of No Rest for the Living up to the secret level, where all maps take place on Earth (and secret level ends with a Spider Mastermind), while Squibbons designed Level 2, and the entire second half of the episode which takes place in the bloodred hell (ending with a Cyberdemon).

7 years after the initial release of No Rest for the Living, The Castle created an ambitious non-official level for Doom II called Redemption of the Slain as an independent indie developer. The level requires GZDoom, as many of its features are needed for the gameplay, including jumping, crouching, and many scripted sequences between mini levels and a secret level. The level is optimized to Brutal Doom, but other than a Cacodemon swarm early on, it never gives problems with standard vanilla GZDoom gameplay. The Castle announced it was his last Doom II project as he now focuses on his new game called Revulsion.

Levels
No Rest for the Living:
 * Level 1: The Earth Base
 * Level 3: Canyon of the Dead
 * Level 4: Hell Mountain (Exit to secret level)
 * Level 9: March of the Demons (Secret level)

Other:
 * Redemption of the Slain

Trivia
All missions made by him in any games will have a small Easter egg box that reads "The Castle Was HERE". In No Rest for the Living it can be found on Level 1 for the first 30 seconds, while in Redemption of the Slain it can be found in the secret Spectre sublevel.