The Final Assault is a mod for registered Wolfenstein, made by Executor. It was released on September 1, 2003. Though it was labeled the fourth installment in the Megastein series, chapters two and three were never made. These were only alluded to in an October 2002 update on The Road to Despair.
Initially released as a beta featuring 8 levels, no final version was ever made.
As with The Road to Despair, it was based on Totengraeber though new sprites, sounds and music appears. In this mod, guards have been replaced by those from Operation: Heimzahlung, but as that mod had a different palette, the guards' uniforms are all hot pink.
It is playable in SDL, using Totengraeber's port.