When it comes to features, 3D Slots are somewhat similar to the modern video slot machines. You'll also find these packed with features like wilds, scatters, free spins, bonus games and progressive jackpots. While the main selling point to them might be the extraordinary graphical experience, they also do their job in terms of lucrativity.
Here's a quick breakdown of the most common features that are includes, these are in no way limited to these exact machines, but are the foundation of slots play.
Wild symbols – these are special symbols, usually ephasized into the main character or symbol of the slot and will substitute for any other ones to maximise your chances of winning. There are all kinds of these – expanding, sticky, stacked, walking and randomly appearing wilds. The time when a simple wild symbol was considered as a pretty lucrative feature is longtime gone.
Free Spins – awarded when a specific set of symbols appear on the reels and once triggered offer you a complete freeroll. Spins for real money are done, but your balance isn't affected and charged for these while all prizes are still awarded.
Bonus Rounds – something that is really exceptional and exclusive to 3D Slots. Other games might also offer bonus games on the second screen, but the level of quality for this in 3D machines is outstanding. If you've played some of the new, realistic computer video games you'll know what we’re talking about.
The big guys have also taken 3D slot machines and their development seriously, but companies like Microgaming or PlayTech are nowhere near the leaders in creation of these games. As far as I'm aware, there are two companies that have created almost a monopoly in 3D slots industry. The two are Betsoft Gaming and Sheriff Gaming, both almost exclusively develop games of this kind along with a couple of table games.
So if you want to have a top notch experience playing 3D Slots Online, your best bet is finding a casino that is powered by either Betsoft or Sheriff. The first of these two actually empowers some casinos that do accept USA players, which is quite a significant advantage due to the fact that options for USA residents are limited.