It looks like you're new here. If you want to get involved, click one of these buttons!
Since the devs for Albion Online appear to be reasonably active on these boards - although AO looks like a pretty nice concept, and it has received some significant press as of late, something has bothered me as I've tracked its development over the past months. People appear to be largely unaware of this, or at least only marginally aware. Nonetheless, to me, this is an important issue:
http://www.reddit.com/r/albiononline - "the first true cross-platform MMO"
https://albiononline.com/ - "the first truly cross-platform MMO experience"
Why are you claiming to be the first true cross-platform MMO?
A) You have Vendetta Online, which was featured in a nation-wide, 2011 Motorola Xoom commercial, and has featured a persistent, cross-platform universe for Mac, Windows, Linux, Android, and iOS since 2013 (including a variety of other devices like the Kindle Fire and the Ouya). It was even labeled "The Most Multiplatform MMO Game Ever" by TechCrunch.
War Thunder devs were referring to their game as a "cross-platform MMO" as early as May 2013, when discussing their plans with Forbes Magazine for porting to the PS4. To my knowledge, they were successful in this and other devices like the Nvidia Shield.
I don't mean to belabor anyone's success, but I'm assuming that you do research these things. This leaves two possibilities:
A) You don't consider War Thunder or Vendetta Online "true MMOs". If this is true, it would make the claim appear petulant at best. But let's examine this; War Thunder involves instanced battles between groups of players. It lacks persistence. I can see how one might think of this as being "not-an-MMO" or at least "not-a-true-MMO" in the same way that Call of Duty is "not-a-true-MMO". Vendetta Online, on the other hand, does involve a persistent universe; when players log off, the game world remains. It is as much of a true MMO in design as Eve.
Perhaps it is because neither War Thunder or Vendetta Online involve Ultima-Online-esque humanoid characters (avatars). Nonetheless, the games themselves do involve MMO-like progression.
You have been hitherto unaware of either of the above games. Vendetta Online's studio is based in Wisconsin, so I can see how this might be the case for this game, as your game is being developed in Berlin. However, War Thunder is made by a Russian studio, and I find it less likely in this case.
Why does this matter?
This matters because we live in a world of "firsts". It is a prestigious thing to be able to claim "first game to do X". History is made by individuals being the first. "First true cross-platform MMO" is a bold claim, and I'd like the developers responsible for making this claim to have the opportunity to back it up.
If it turns out that this is not a claim you wish to forge boldly ahead with, let me offer a suggestion: add the word "terrestrial" in place of "true". This is still a worthwhile claim, and certainly improves its veracity.