The motto was clear, we will create the first RPG based upon a blockchain

Very cool.

Is there any plans to reward player achievements with steem or SBD or perhaps an SMT made specifically for the game?

I've posted about this possibility in the past, but I'm not entirely sure if it could be made unfalsifiable. It should be easy enough to gather up the currency to payout, just have a single "rewards pool" post per day and divvy out a percentage of that payout to the gamers, proportionate to how one or more of the game metrics compare to each other.

It seems to me that it would be difficult to establish a way to prove that I achieved X on day Y in the game. I suppose you could set it up to pay out by high score like on an arcade game, but without a way to prove timestamp you'd still run into problems.