This is the demo used to properly encode until the ending in Episode 3 of The Ultimate Doom, publication [2879] PC The Ultimate Doom "Episode 3" by Akse in 2:55 (IGT).
The reason why is this demo needed is because the "extended inputs" demo file originally provided by feos doesn't reach the ending in DSDA-Doom inside the latest DOOM encoding package. This demo file adds (approximately) 92 tics (1 tic "Use" button with the prior tics correspond to "time wait") over the original demo file.