this Earth2 demo video looks much like its based on "unreal wild" developed by a former outerra developer. It looks allmost the same.
https://unrealwild.com/It may be something serious development ..or maybe not ... maybe just a scam to steal money...who knows....
I am just saying I wouldn't put my money into something that you don't know what it is, what it will be , when it will be. ...
Then its better to invest in outerra ..probably much less waiting time ...plus outerar doesn't ask to access you wallet