Downloads: A new file has been added by Skyward:
File contains Shotty Power; Shotty Power 2 and Pro | Shotty Power.
Shotty Power 2 is a wider map but different from Shotty Power.
Pro | Shotty Power is almost the same as the original version but some textures have been changed and the side walls are a little bit higher. It comes from the Pro DM pack.
Unarchive those files in your Serious Sam Directory; Levels>LevelsMP>Deathmatch.