I own the first three games already. Why would I buy then again? Is this done on the engine for MOO3?

You get the first three for free if you buy the collector's edition.

Thank you for not answering my question and confirming the only thing i did know.

Thanks for asking a coherent question. What do you mean done on the engine of MOO3? I was saying you get them for free regardless, but back to your done on the engine question. Nothing is done on the engine. What does this even mean? Do you mean the game engine? The engine editor? The little engine that could? People will be nicer to you if you don't try to slam them for trying to help you by answering a poorly worded question.

It is probably not using same game engine, if that is what you mean, MoO3 is old and quite different.

Comparing this to MoO3? Both have star lanes and real time combat, However, you can control the ships, and overall you play more like in first games, unlike MoO3's "set game and end turns until you win". IMO this game is much better than MoO3, even this is still unfinished game, and has bugs, because MoO3 is one of the WORST games I have played.

Comparing this to MoO2? If colony building and overall UI felt a bit like like MoO1 + Master of Magic, this game feels like MoO2 + Civ5. IMO Not as good game as MoO2 (yet?), because MoO2 is one of the BEST games ever, but still good.

Comparing this to MoO1? Some races and music are updated from MoO1. IMO this game is better than MoO1, but they both have their strenght and weaknesses.