This was the first for-press demo of the Video Game Powder, then published 
in 1998 by Verkosoft.
The archived file is a DMS file: to be used on a real amiga you need DMS 
or a similar utility to unpack it in a real floppy disk. 

For emulators like WinUAE just mount the DMS file and start emulation.

Archive:  /home/aminet/aminet_root/doc//game/demo/POWDERDEMO.zip
 Length   Method    Size  Cmpr    Date    Time   CRC-32   Name
--------  ------  ------- ---- ---------- ----- --------  ----
  303943  Defl:N   303486   0% 2014-05-17 21:55 672af9fc  POWDERDEMO.DMS
--------          -------  ---                            -------
  303943           303486   0%                            1 file