diff --git a/res/GAMES.CONF b/res/GAMES.CONF
index 3158b2ac0..e73399d1b 100755
--- a/res/GAMES.CONF
+++ b/res/GAMES.CONF
@@ -301,6 +301,7 @@
 1000,LAST.GLADIATOR=The Last Gladiator
 1111,THE.LAST.NINJA
 0001,SPY.STRIKES.BAK=The Spy Strikes Back
+1001,THAROLIAN.TUNLS=Tharolian Tunnels
 0010,THEXDER
 0000,THIEF
 0001,THRESHOLD
diff --git a/res/TITLE.HGR/THAROLIAN.TUNLS b/res/TITLE.HGR/THAROLIAN.TUNLS
new file mode 100644
index 000000000..25715d84d
Binary files /dev/null and b/res/TITLE.HGR/THAROLIAN.TUNLS differ
diff --git a/res/TITLE.HGR/_FileInformation.txt b/res/TITLE.HGR/_FileInformation.txt
index dc8e808b0..7ba44fd6a 100644
--- a/res/TITLE.HGR/_FileInformation.txt
+++ b/res/TITLE.HGR/_FileInformation.txt
@@ -264,6 +264,7 @@ SWASHBUCKLER=Type(06),AuxType(4000),Access(C3)
 TAG.TEAM=Type(06),AuxType(4000),Access(C3)
 TAPPER=Type(06),AuxType(4000),Access(C3)
 TETRIS=Type(06),AuxType(4000),Access(C3)
+THAROLIAN.TUNLS=Type(06),AuxType(4000),Access(C3)
 THE.BILESTOAD=Type(06),AuxType(4000),Access(C3)
 THE.DAM.BUSTERS=Type(06),AuxType(4000),Access(C3)
 THE.GOONIES=Type(06),AuxType(4000),Access(C3)
diff --git a/res/dsk/tharolian tunnels PRODOS (san inc pack).po b/res/dsk/tharolian tunnels PRODOS (san inc pack).po
new file mode 100644
index 000000000..f6c6a7ba1
Binary files /dev/null and b/res/dsk/tharolian tunnels PRODOS (san inc pack).po differ
diff --git a/res/notes/wishlist.txt b/res/notes/wishlist.txt
index 87f81f627..def8a9422 100644
--- a/res/notes/wishlist.txt
+++ b/res/notes/wishlist.txt
@@ -13,7 +13,6 @@ Pegasus ][
 Shuttle Intercept
 Super Huey
 Super Taxman II
-Tharolian Tunnels [priority]
 Video Vegas
 
 //4am crack (unreleased)
diff --git a/src/constants.a b/src/constants.a
index 63da5ddb4..775eb215b 100644
--- a/src/constants.a
+++ b/src/constants.a
@@ -6,7 +6,7 @@
 ; YE OLDE GRAND UNIFIED MEMORY MAP
 ;
 ; LC RAM BANK 1
-; D000..E8A3 - persistent data structures (gGlobalPrefsStore, gGamesListStore)
+; D000..E8C9 - persistent data structures (gGlobalPrefsStore, gGamesListStore)
 ; ...unused...
 ; E91D..FFF1 - main program code
 ; FFF2..FFF9 - API functions and global constants available for main program
diff --git a/src/prelaunch/tharolian.tunls.a b/src/prelaunch/tharolian.tunls.a
new file mode 100644
index 000000000..3b8bd0a60
--- /dev/null
+++ b/src/prelaunch/tharolian.tunls.a
@@ -0,0 +1,40 @@
+;license:MIT
+;(c) 2020 by qkumba
+
+!cpu 6502
+!to "build/PRELAUNCH/THAROLIAN.TUNLS",plain
+*=$106
+
+    !source "src/prelaunch/common.a"
+
+         +ENABLE_ACCEL
+         lda   #$60
+         sta   $6099
+         jsr   $6000      ; decompress
+         lda   #$4C
+         sta   $9607
+         lda   #<callback
+         sta   $9608
+         lda   #>callback
+         sta   $9609
+         +DISABLE_ACCEL
+         jsr   $60A7
+         jmp   $609C
+
+callback
+         sta   $9780
+         pha
+         +ENABLE_ACCEL
+         pla
+         jsr   $960A
+         +GET_MACHINE_STATUS
+         and   #CHEATS_ENABLED
+         beq   +
+         lda   #$ad
+         sta   $1DA0      ; patch - don't decrease lives
++        +DISABLE_ACCEL
+         rts
+
+!if * > $1C0 {
+  !error "code is too large, ends at ", *
+}