When it comes to native gambling DApps on the Steem blockchain, there's really not that many out there. With the disappearance of Magic-Dice & MoonSteem, there are currently only two well-known Steem casinos out there. Luckily, these have shown no sign of leaving and they offer its users some fun & exciting casino games.
In this article, I'm going to be looking at both Epic Dice & Steem Slot Games. I've spend quite some time playing on these casinos, so I've already formed an opinion about what the pros and cons are.
Now, I do wish there were more gambling DApps on Steem to review. Steem would be the perfect platform for online gambling, given that it boasts near-instant transactions and users can send as much Steem as they'd like, without paying transaction fees.
I first came across Epic Dice, right after Magic Dice closed down. The main feature that drew me in, was the fact that they had also issued their own EPC token on Steem-Engine. Epic Dice's token allows you, the user, to earn daily dividends depending on the amount of EPC tokens you hold.
You basically earn more tokens, as you play. The more Steem you wager, the more tokens you will receive! Wagering 1 Steem currently earns you 100 EPC tokens.
Of course, you can also buy EPC tokens directly via the Steem-Engine exchange. This allows you to hugely increase your dividends, without having to gamble.
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As the name suggest, Epic Dice offers a simple dice game and when I say simple, I really do mean simple. As far as I know, there is no auto-bet functionality, which is a bit cumbersome to be honest. I do think it's nice that they're using whole numbers for their dice game, which makes it a bit more pleasant to look at compared to other more complicated dice games.
The house-edge is set at 2% and they offer provable fair dice rolls, of which you can check the fairness yourself in their FAQ section.
Epic Dice also runs daily wagering contest, at which the players who've wagered the highest amount of Steem get additional EPC tokens. There currently isn't that much competition, so it's relatively easy to win these if you wager at the maximum odds.
Epic Dice currently offers referral rewards to the tune of 10% of the house-edge earned by players you've referred. I personally feel that it's somewhat of a missed opportunity, to not also offer EPC tokens for bringing on new players.
Steem Slot Games is a fully operational casino that uses Steem as its main currency for gambling. As far as I know, games are not played on the Steem blockchain itself, but they make up for that by offering you a good choice of casino games.
Steem Slot Games offers two uniquely branded slot games, Steem Stone & Steemerald Fortune. I've played both of these games and I personally prefer Steem Stone over Steemerald Fortune. You can win pretty huge multipliers with both these games, I've personally won over 100 Steem with wagers of less than 1 Steem!
Even though their casino is called Steem Slot Games, that doesn't mean they only offer slot games to their players. One of the most fun games, in my opinion, is their European Roulette. The standard house-edge on European Roulette is fixed at 2.70%.
This particular roulette game is visually pleasing, but it also has a few quirks. While the gameplay itself is pretty smooth, I find it a little bit annoying that the controls have no information of their functionality displayed. Especially in the beginning, you'll have to find out by yourself what function each control button has.
While there currently aren't any dice game available on Steem Slot Games, they have announced that they will be adding one in the future.
There are quite a few contests running on Steem Slot Games, they have a weekly contest where you can win prizes of you have the highest amount of rolls. Notice that this contest is not dependant on the amount of Steem you have wagered. On top of that, they also run regular promotions on the Steem blog 
Their referral program is actually quite interesting, since they offer you a fixed amount of Steem for each referral you bring to their website. In total you can receive up to 16 Steem for each new member you refer.
When a referred player will make 100 spins you will receive 1 STEEM
When a referred player will make 500 spins you will receive 2 STEEM
When a referred player will make 1000 spins you will receive 3 STEEM
When a referred player will make 2500 spins you will receive 10 STEEM
