diff --git a/src/mame/drivers/namcos23.c b/src/mame/drivers/namcos23.c
index ff4761dc26c..68d3253e32f 100644
--- a/src/mame/drivers/namcos23.c
+++ b/src/mame/drivers/namcos23.c
@@ -102,19 +102,19 @@ Namco, 1997 - 2000
 Note! This document is a Work-In-Progress and will be updated from time to time when more dumps are available.
 
 This document covers all the known Namco Gorgon / System 23 / Super System 23 games, including....
-Final Furlong     Namco, 1997    System 22.5/Gorgon
-Rapid River       Namco, 1997    System 22.5/Gorgon
-Motocross Go!     Namco, 1997    System 23
-Time Crisis II    Namco, 1997    System 23 and Super System 23
-Downhill Bikers   Namco, 1997    System 23
-Panic Park        Namco, 1998    System 23
-*Angler King      Namco, 1999    System 23
-Gunmen Wars       Namco, 1998    Super System 23
-*Race On!         Namco, 1998    Super System 23
-500 GP            Namco, 1998    Super System 23
-Final Furlong 2   Namco, 1999    Super System 23
-*Guitar Jam       Namco, 1999    Super System 23
-Crisis Zone       Namco, 2000    System 23 Evolution 2
+Final Furlong     Namco, 1997/07    System 22.5/Gorgon
+Motocross Go!     Namco, 1997/11    System 23
+Rapid River       Namco, 1997/12    System 22.5/Gorgon
+Downhill Bikers   Namco, 1998/03    System 23
+Time Crisis II    Namco, 1998/04    System 23 and Super System 23
+Panic Park        Namco, 1998/05    System 23
+*Race On!         Namco, 1998/09    Super System 23
+Gunmen Wars       Namco, 1998/11    Super System 23
+*Angler King      Namco, 1999/03    Super System 23
+500 GP            Namco, 1999/03    Super System 23
+Final Furlong 2   Namco, 1999/03    Super System 23
+*Guitar Jam       Namco, 1999/07    System 23
+Crisis Zone       Namco, 1999/12    System 23 Evolution 2
 
 * - denotes not dumped yet (and hardware type not confirmed, they might not be System 23 hardware).
 If you can help with the remaining undumped S22.5/S23/SS23 games, please contact me at http://guru.mameworld.info/