diff --git a/buildcfg.txt b/buildcfg.txt
index bf35b905..ad82ebbf 100644
--- a/buildcfg.txt
+++ b/buildcfg.txt
@@ -187,6 +187,7 @@ DMXGUS
 DEMO1 = demo1_d2
 DEMO2 = demo2_d2
 DEMO3 = demo3_d2
+DEMO4 = demo4_d2
 
 #else /* not DOOM2 */
 
diff --git a/lumps/demo1_d2.lmp b/lumps/demo1_d2.lmp
index f0b58407..aeac39fc 100644
Binary files a/lumps/demo1_d2.lmp and b/lumps/demo1_d2.lmp differ
diff --git a/lumps/demo1_ud.lmp b/lumps/demo1_ud.lmp
index a189583a..992116b4 100644
Binary files a/lumps/demo1_ud.lmp and b/lumps/demo1_ud.lmp differ
diff --git a/lumps/demo2_d2.lmp b/lumps/demo2_d2.lmp
index 16bf48e4..68ae04ec 100644
Binary files a/lumps/demo2_d2.lmp and b/lumps/demo2_d2.lmp differ
diff --git a/lumps/demo2_ud.lmp b/lumps/demo2_ud.lmp
index 588ac588..6bb7290c 100644
Binary files a/lumps/demo2_ud.lmp and b/lumps/demo2_ud.lmp differ
diff --git a/lumps/demo3_d2.lmp b/lumps/demo3_d2.lmp
index 49378425..0cc397bf 100644
Binary files a/lumps/demo3_d2.lmp and b/lumps/demo3_d2.lmp differ
diff --git a/lumps/demo3_ud.lmp b/lumps/demo3_ud.lmp
index e7d2f16b..5444cdfa 100644
Binary files a/lumps/demo3_ud.lmp and b/lumps/demo3_ud.lmp differ
diff --git a/lumps/demo4_d2.lmp b/lumps/demo4_d2.lmp
new file mode 100644
index 00000000..667bfa5e
Binary files /dev/null and b/lumps/demo4_d2.lmp differ
diff --git a/lumps/demo4_ud.lmp b/lumps/demo4_ud.lmp
new file mode 100644
index 00000000..c20272c2
Binary files /dev/null and b/lumps/demo4_ud.lmp differ