diff --git a/res/GAMES.CONF b/res/GAMES.CONF
index 4d437eee0..47ff8c0f9 100755
--- a/res/GAMES.CONF
+++ b/res/GAMES.CONF
@@ -98,6 +98,7 @@
 0110,DEATH.SWORD
 1001,DEFENDER
 1000,DEFEND.JH=Defender (Joe Holt)
+0000,DEMONIC.DECKS
 1000,DEPTH.CHARGE
 0001,DIAMOND.MINE
 0001,DIG.DUG
diff --git a/res/TITLE.HGR/DEMONIC.DECKS b/res/TITLE.HGR/DEMONIC.DECKS
new file mode 100644
index 000000000..060666f20
Binary files /dev/null and b/res/TITLE.HGR/DEMONIC.DECKS differ
diff --git a/res/TITLE.HGR/_FileInformation.txt b/res/TITLE.HGR/_FileInformation.txt
index 1f19c0821..647b316f6 100644
--- a/res/TITLE.HGR/_FileInformation.txt
+++ b/res/TITLE.HGR/_FileInformation.txt
@@ -93,6 +93,7 @@ CYCLOD=Type(06),AuxType(4000),Access(C3)
 DANGEROUS.DAVE=Type(06),AuxType(4000),Access(C3)
 DEFEND.JH=Type(06),AuxType(4000),Access(C3)
 DEFENDER=Type(06),AuxType(4000),Access(C3)
+DEMONIC.DECKS=Type(06),AuxType(4000),Access(C3)
 DEPTH.CHARGE=Type(06),AuxType(4000),Access(C3)
 DIAMOND.MINE=Type(06),AuxType(4000),Access(C3)
 DIG.DUG=Type(06),AuxType(4000),Access(C3)
diff --git a/res/dsk/demonic decks PRODOS (san inc pack).po b/res/dsk/demonic decks PRODOS (san inc pack).po
new file mode 100644
index 000000000..dead2038b
Binary files /dev/null and b/res/dsk/demonic decks PRODOS (san inc pack).po differ
diff --git a/src/constants.a b/src/constants.a
index 6ac15af87..d0fb3d4c5 100644
--- a/src/constants.a
+++ b/src/constants.a
@@ -6,7 +6,7 @@
 ; YE OLDE GRAND UNIFIED MEMORY MAP
 ;
 ; LC RAM BANK 1
-; D000..E853 - persistent data structures (gGlobalPrefsStore, gGamesListStore)
+; D000..E865 - persistent data structures (gGlobalPrefsStore, gGamesListStore)
 ; E92D..FFF1 - main program code
 ; FFF2..FFF9 - API functions and global constants available for main program
 ;              code, prelaunchers, transition effects, &c.
diff --git a/src/prelaunch/demonic.decks.a b/src/prelaunch/demonic.decks.a
new file mode 100644
index 000000000..c81a92a62
--- /dev/null
+++ b/src/prelaunch/demonic.decks.a
@@ -0,0 +1,19 @@
+;license:MIT
+;(c) 2021 by qkumba
+
+!cpu 6502
+!to "build/PRELAUNCH/DEMONIC.DECKS",plain
+*=$106
+
+         !source "src/prelaunch/common.a"
+
+         +ENABLE_ACCEL
+         lda   #$60
+         sta   $206A
+         jsr   $2000      ; decompress
+         +DISABLE_ACCEL
+         jmp   $200
+
+!if * > $1C0 {
+  !error "code is too large, ends at ", *
+}