Here is a $13 free play bonus at two different casinos. Both are only good this Halloween (10/31/15). No deposit needed. No bonus code needed either, for that matter. Just create an account at these two casinos:
$13 Scary Halloween Freeplay
Game allowed: Scary Rich I, II and III
Start Time: 10/31/2015 00:00 EST
End Time: 10/31/2015 23:59 EST
Just create an account at the casinos above and view the cashier. The free play bonus will be there for you to claim.