This is Cryptoburners Megademo II.  It works fine on the Amiga 3000.

 PERMSSN    UID  GID    PACKED    SIZE  RATIO     CRC       STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
-rw-r--r--  3023/111    433871  433871 100.0% -lh0- 5115 Dec 27  1992 CRB.Megademo2-a.DMS
-rw-r--r--  3023/111    362859  362859 100.0% -lh0- e3af Dec 27  1992 CRB.Megademo2-b.DMS
-rw-r--r--  3023/111        69      69 100.0% -lh0- 5678 Dec 27  1992 CRB.Megademo2.readme
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total         3 files  796799  796799 100.0%            Dec 26  1992