Seafight vs Tartaros Rebirth
Seafight
Seafight is an amazing pirate-themed MMO game published by BigPoint Games. In this game, you'll get to navigate the high seas, defeat a wide variety of sea monsters, and even engage in intense naval warfare with other players with your very own ship. if you're a part of a guild, you can also participate in special guild wars that will see you defending or attacking the opposing Guild Island alongside your comrades in arms.Seafight is generally a free-to-play game but there are some features that are reserved for premium players only. This isn't very different from the other forms of monetization methods used in other free-to-play games really.
Tartaros Rebirth
Tartaros Rebirth is the revived version of the anime-themed MMORPG that was popular back in the 2000s, Tartaros Online. Featuring everything you know and love from back in the day, this game has something new to offer as well, such as brand-new storylines. Like the original, you'll get to play as one of nine unique characters, each with their own personalities and skillsets. You can switch between them while you're in town, but not in dungeons or instances. Questing is the main way to level up in this game and the grind is real. However, there are tons of places for you to explore and you can even use higher level characters to complete quests for your lower level characters to turn in.The combat system is rather clunky though, so is its controls with keys that you'll probably have to rebind. Battles are played out in a semi-action-based manner, but since you can't really dodge, block or dash away from danger, all the "non-action" can be a bit underwhelming. Not to mention, the graphics isn't updated somehow and although it may have been acceptable back then, it is definitely not something that will appeal to players in this day and age.
So, in short, Tartaros Rebirth is a great anime-themed game to play, despite sharing many similarities with Dragon Nest, for nostalgic purposes but if you're simply looking for a new anime game to play, you might have a better time playing Lineage II: Revolution.