Updated Difficult to Emulate Games (markdown)

Difficult-to-Emulate-Games.md

@@ -6,6 +6,13 @@ TODO: Sort into categories or something... the list ended up being much longer t
 
 ***
 
+### Castrol Honda Superbike Racing
+### Shadow Master
+
+ - Relies on the CLUT being cached for title screens, the VRAM that the primitives point to gets overwritten.
+
+***
+
 ### Monkey Hero
  - DMA transfer timing or FMVs lock up
  - Commands spanning multiple blocks