diff --git a/source_files/ddf/ddf_thing.cc b/source_files/ddf/ddf_thing.cc
index a798429f0..83b8b5c2d 100644
--- a/source_files/ddf/ddf_thing.cc
+++ b/source_files/ddf/ddf_thing.cc
@@ -1560,6 +1560,7 @@ static DDFSpecialFlags extended_specials[] = {{"RESPAWN", kExtendedFlagNoRespawn
                                               {"USABLE", kExtendedFlagUsable, 0},
                                               {"BLOCK_SHOTS", kExtendedFlagBlockShots, 0},
                                               {"TUNNEL", kExtendedFlagTunnel, 0},
+                                              {"BORE", (kExtendedFlagTunnel|kExtendedFlagBore), 0},
                                               {"SIMPLE_ARMOUR", kExtendedFlagSimpleArmour, 0},
                                               {nullptr, 0, 0}};
 
diff --git a/source_files/ddf/ddf_thing.h b/source_files/ddf/ddf_thing.h
index 11430f240..9d0409184 100644
--- a/source_files/ddf/ddf_thing.h
+++ b/source_files/ddf/ddf_thing.h
@@ -174,7 +174,11 @@ enum ExtendedFlag
     kExtendedFlagCrouching = (1 << 25),
     // Missile can tunnel through enemies.  -AJA- 2000/10/23
     kExtendedFlagTunnel = (1 << 26),
-    // NO LONGER USED (1 << 27),  // was: DLIGHT
+    // Missile tunnels through enemies, but damages each enemy for as long
+    // as it is in contact. This differs from the above in that TUNNEL
+    // only damages each mobj that it passes through once by keeping a simple
+    // hash list - Dasho
+    kExtendedFlagBore = (1 << 27),
     // Thing has been gibbed.
     kExtendedFlagGibbed = (1 << 28),
     // -AJA- 2004/07/22: play the monster sounds at full volume
diff --git a/source_files/dehacked/deh_things.cc b/source_files/dehacked/deh_things.cc
index 90cf2885e..c5a4b9f0c 100644
--- a/source_files/dehacked/deh_things.cc
+++ b/source_files/dehacked/deh_things.cc
@@ -757,7 +757,7 @@ const FlagName mbf21flag_list[] = {
     {kMBF21_RANGEHALF, "RANGEHALF", "TRIGGER_HAPPY"},
     {kMBF21_NOTHRESHOLD, "NOTHRESHOLD", "NOGRUDGE"},
     {kMBF21_BOSS, "BOSS", "BOSSMAN"},
-    {kMBF21_RIP, "RIP", "TUNNEL"},
+    {kMBF21_RIP, "RIP", "BORE"},
     {kMBF21_FULLVOLSOUNDS, "FULLVOLSOUNDS", "ALWAYS_LOUD"},
 
     // flags which don't produce an Edge special
diff --git a/source_files/edge/p_action.cc b/source_files/edge/p_action.cc
index 5195dd4f8..10a50bd6d 100644
--- a/source_files/edge/p_action.cc
+++ b/source_files/edge/p_action.cc
@@ -1790,14 +1790,18 @@ int MissileContact(MapObject *object, MapObject *target)
     // the first impact.
     if (object->extended_flags_ & kExtendedFlagTunnel)
     {
-        // this hash is very basic, but should work OK
-        uint32_t hash = (uint32_t)(long long)target;
+        // unless it uses the new BORE special - Dasho
+        if (!(object->extended_flags_ & kExtendedFlagBore))
+        {
+            // this hash is very basic, but should work OK
+            uint32_t hash = (uint32_t)(long long)target;
 
-        if (object->tunnel_hash_[0] == hash || object->tunnel_hash_[1] == hash)
-            return -1;
+            if (object->tunnel_hash_[0] == hash || object->tunnel_hash_[1] == hash)
+                return -1;
 
-        object->tunnel_hash_[0] = object->tunnel_hash_[1];
-        object->tunnel_hash_[1] = hash;
+            object->tunnel_hash_[0] = object->tunnel_hash_[1];
+            object->tunnel_hash_[1] = hash;
+        }
         if (object->info_->rip_sound_)
             StartSoundEffect(object->info_->rip_sound_, kCategoryObject, object, 0);
     }