diff --git a/res/GAMES.CONF b/res/GAMES.CONF
index 332b37621..4d0b899e5 100755
--- a/res/GAMES.CONF
+++ b/res/GAMES.CONF
@@ -189,6 +189,7 @@
 0000,NIGHT.STALKER
 0000,NIGHTMARE=Nightmare Gallery
 0000,N.O.R.A.D
+0001,OID.ZONE
 1000,ONE.ON.ONE=One on One
 0000,ORBITRON
 0000,ORILEYS.MINE=O'Riley's Mine
diff --git a/res/TITLE.HGR/OID.ZONE b/res/TITLE.HGR/OID.ZONE
new file mode 100644
index 000000000..2e768817d
Binary files /dev/null and b/res/TITLE.HGR/OID.ZONE differ
diff --git a/res/TITLE.HGR/_FileInformation.txt b/res/TITLE.HGR/_FileInformation.txt
index 5b49d29bb..1f0a9084d 100644
--- a/res/TITLE.HGR/_FileInformation.txt
+++ b/res/TITLE.HGR/_FileInformation.txt
@@ -144,6 +144,7 @@ LASER.BOUNCE=Type(06),AuxType(4000),Access(C3)
 LAST.GLADIATOR=Type(06),AuxType(4000),Access(C3)
 LAZER.SILK=Type(06),AuxType(4000),Access(C3)
 LITTLE.COMP.PPL=Type(06),AuxType(4000),Access(C3)
+LOCK.N.CHASE=Type(06),AuxType(4000),Access(C3)
 LODE.RUNNER=Type(06),AuxType(4000),Access(C3)
 LOST.TOMB=Type(06),AuxType(4000),Access(C3)
 MAD.BOMBER=Type(06),AuxType(4000),Access(C3)
@@ -174,6 +175,7 @@ NIBBLER=Type(06),AuxType(4000),Access(C3)
 NIGHT.MISSION=Type(06),AuxType(4000),Access(C3)
 NIGHT.STALKER=Type(06),AuxType(4000),Access(C3)
 NIGHTMARE=Type(06),AuxType(4000),Access(C3)
+OID.ZONE=Type(06),AuxType(4000),Access(C3)
 ONE.ON.ONE=Type(06),AuxType(4000),Access(C3)
 OOTW=Type(06),AuxType(4000),Access(C3)
 ORBITRON=Type(06),AuxType(4000),Access(C3)
diff --git a/res/dsk/oid zone 19k file PRODOS (san inc pack).po b/res/dsk/oid zone 19k file PRODOS (san inc pack).po
new file mode 100644
index 000000000..a1473ac13
Binary files /dev/null and b/res/dsk/oid zone 19k file PRODOS (san inc pack).po differ
diff --git a/src/constants.a b/src/constants.a
index 08a62eede..edbbb2419 100644
--- a/src/constants.a
+++ b/src/constants.a
@@ -6,7 +6,7 @@
 ; YE OLDE GRAND UNIFIED MEMORY MAP
 ;
 ; LC RAM BANK 1
-; D000..E802 - persistent data structures (gGlobalPrefsStore, gGamesListStore)
+; D000..E82E - persistent data structures (gGlobalPrefsStore, gGamesListStore)
 ; ...unused...
 ; E915..FFF1 - main program code
 ; FFF2..FFF9 - API functions and global constants available for main program
diff --git a/src/prelaunch/oid.zone.a b/src/prelaunch/oid.zone.a
new file mode 100644
index 000000000..3101e558e
--- /dev/null
+++ b/src/prelaunch/oid.zone.a
@@ -0,0 +1,26 @@
+;license:MIT
+;(c) 2020 by qkumba
+
+!cpu 6502
+!to "build/PRELAUNCH/OID.ZONE",plain
+*=$106
+
+    !source "src/prelaunch/common.a"
+
+         +ENABLE_ACCEL
+         lda   #$60
+         sta   $51CA
+         jsr   $800       ; decompress
+
+         +GET_MACHINE_STATUS
+         and   #CHEATS_ENABLED
+         beq   +
+         lda   #$ad
+         sta   $7FD5      ; patch - don't decrease lives
++
+         +DISABLE_ACCEL
+         jmp   $3FFD
+
+!if * > $1C0 {
+  !error "code is too large, ends at ", *
+}