diff --git a/res/ACTION.HGR.UNCOMPRESSED/THUNDERHEAD b/res/ACTION.HGR.UNCOMPRESSED/THUNDERHEAD
new file mode 100644
index 000000000..8716cd592
Binary files /dev/null and b/res/ACTION.HGR.UNCOMPRESSED/THUNDERHEAD differ
diff --git a/res/ACTION.HGR.UNCOMPRESSED/THUNDERHEAD2 b/res/ACTION.HGR.UNCOMPRESSED/THUNDERHEAD2
new file mode 100644
index 000000000..d8ce5e71e
Binary files /dev/null and b/res/ACTION.HGR.UNCOMPRESSED/THUNDERHEAD2 differ
diff --git a/res/ACTION.HGR/THUNDERHEAD b/res/ACTION.HGR/THUNDERHEAD
new file mode 100644
index 000000000..ddb4e6ffd
Binary files /dev/null and b/res/ACTION.HGR/THUNDERHEAD differ
diff --git a/res/ACTION.HGR/THUNDERHEAD2 b/res/ACTION.HGR/THUNDERHEAD2
new file mode 100644
index 000000000..3dc663e14
Binary files /dev/null and b/res/ACTION.HGR/THUNDERHEAD2 differ
diff --git a/res/ACTION.HGR/_FileInformation.txt b/res/ACTION.HGR/_FileInformation.txt
index d5895fcea..09ab2c05d 100644
--- a/res/ACTION.HGR/_FileInformation.txt
+++ b/res/ACTION.HGR/_FileInformation.txt
@@ -605,6 +605,8 @@ THEXDER2=Type(06),AuxType(3FF8),Access(C3)
 THIEF=Type(06),AuxType(3FF8),Access(C3)
 THRESHOLD=Type(06),AuxType(3FF8),Access(C3)
 THUNDER.BOMBS=Type(06),AuxType(3FF8),Access(C3)
+THUNDERHEAD=Type(06),AuxType(3FF8),Access(C3)
+THUNDERHEAD2=Type(06),AuxType(3FF8),Access(C3)
 TOMAHAWK=Type(06),AuxType(3FF8),Access(C3)
 TRACK.AND.FIELD=Type(06),AuxType(3FF8),Access(C3)
 TRIAD=Type(06),AuxType(3FF8),Access(C3)
diff --git a/res/ARTWORK.SHR.UNCOMPRESSED/THUNDERHEAD b/res/ARTWORK.SHR.UNCOMPRESSED/THUNDERHEAD
new file mode 100644
index 000000000..d819e65dc
Binary files /dev/null and b/res/ARTWORK.SHR.UNCOMPRESSED/THUNDERHEAD differ
diff --git a/res/ARTWORK.SHR/THUNDERHEAD b/res/ARTWORK.SHR/THUNDERHEAD
new file mode 100644
index 000000000..f95ed2e7f
Binary files /dev/null and b/res/ARTWORK.SHR/THUNDERHEAD differ
diff --git a/res/ARTWORK.SHR/_FileInformation.txt b/res/ARTWORK.SHR/_FileInformation.txt
index 9db01d6ab..2d8825469 100644
--- a/res/ARTWORK.SHR/_FileInformation.txt
+++ b/res/ARTWORK.SHR/_FileInformation.txt
@@ -122,6 +122,7 @@ THE.GOONIES=Type(06),AuxType(1FF8),Access(C3)
 THE.HEIST=Type(06),AuxType(1FF8),Access(C3)
 THE.LAST.NINJA=Type(06),AuxType(1FF8),Access(C3)
 THEXDER=Type(06),AuxType(1FF8),Access(C3)
+THUNDERHEAD=Type(06),AuxType(1FF8),Access(C3)
 TOMAHAWK=Type(06),AuxType(1FF8),Access(C3)
 TRIAD=Type(06),AuxType(1FF8),Access(C3)
 UP.N.DOWN=Type(06),AuxType(1FF8),Access(C3)
diff --git a/res/ATTRACT/THUNDERHEAD b/res/ATTRACT/THUNDERHEAD
index 12611bd96..28093cacd 100644
--- a/res/ATTRACT/THUNDERHEAD
+++ b/res/ATTRACT/THUNDERHEAD
@@ -3,5 +3,8 @@
 # This file is automatically generated
 #
 
+ARTWORK.SHR/THUNDERHEAD=C
+ACTION.HGR/THUNDERHEAD2=A
+ACTION.HGR/THUNDERHEAD=A
 
 [eof]
diff --git a/res/SS/ACTIONMNO1.CONF b/res/SS/ACTIONMNO1.CONF
index 386eec571..8fc26806c 100644
--- a/res/SS/ACTIONMNO1.CONF
+++ b/res/SS/ACTIONMNO1.CONF
@@ -10,5 +10,6 @@ N.O.R.A.D
 ORBITRON
 MARIO.BROS3=MARIO.BROS
 MS.PACMAN1=MS.PACMAN
+THUNDERHEAD
 
 [eof]
diff --git a/res/SS/ACTIONMNO2.CONF b/res/SS/ACTIONMNO2.CONF
index d65a0812e..7ddf8b713 100644
--- a/res/SS/ACTIONMNO2.CONF
+++ b/res/SS/ACTIONMNO2.CONF
@@ -10,6 +10,7 @@ MAXWELL.MANOR
 NIBBLER
 NIGHTMARE
 N.O.R.A.D2=N.O.R.A.D
+THUNDERHEAD2=THUNDERHEAD
 OUTPOST
 MR.DO.L10=MR.DO
 
diff --git a/res/SS/MNO3.CONF b/res/SS/MNO3.CONF
index 7093405f2..2060a6eac 100644
--- a/res/SS/MNO3.CONF
+++ b/res/SS/MNO3.CONF
@@ -5,6 +5,7 @@
 NIGHT.MISSION
 MAD.BOMBER
 MR.DO
+THUNDERHEAD
 OUTPOST
 NIBBLER
 N.O.R.A.D
diff --git a/res/SS/OTHER6.CONF b/res/SS/OTHER6.CONF
index 7450e3945..4d771584c 100644
--- a/res/SS/OTHER6.CONF
+++ b/res/SS/OTHER6.CONF
@@ -14,5 +14,6 @@ DINO.SMURF
 DOUBLE.TROUBLE
 CAVRNS.CALLISTO
 MANIC.MINER
+THUNDERHEAD
 
 [eof]
diff --git a/res/SS/SHR25.CONF b/res/SS/SHR25.CONF
index 284630097..4d0df4c02 100644
--- a/res/SS/SHR25.CONF
+++ b/res/SS/SHR25.CONF
@@ -3,6 +3,7 @@
 #
 
 G.I.JOE
+THUNDERHEAD
 SPINDIZZY
 COUNTY.FAIR
 GHOSTBUSTERS