"If I understand correctly the NAS system can be gamed.

It takes the last 2 digits of the block that includes the transaction.

If you are a big stake holder you forge blocks regularly, so you can place your bet only if you know that you will forge the next block and you will win. (only broadcast the block if you win)." - TwinWinNerD

or rather keep trying slight variations on the transactions inside the block until the resulting block means a win for you, and then broadcast that forged block.

Outcome would be the same, i.e. the dice game can be gamed.

Are there any specifications about the NAS dice game - how it works? Or is there any source code for WinNAS yet?

@Nas_Coin can you respond to this?