Wolfbat is the fifth mod by Fred Kenny. It was released on April 28, 2002. As with his other sets, it features the same new levels on Episode 3 with a new VSWAP, this time focusing on bats as the enemy.
Many new textures have been added, again focusing on high-density colors and oddball messages, e.g. Hitler Is a Faggot! and Hitler Is a Jew!
No changes were made to the source code, and it can thus be played in SDL.