say that to the people who pre ordered No man's sky.
and indeed one can check after the release.
Okay, so you honestly do not seem to know what alpha means. It means that the game is not a finished product. Not all the features which will be in the final game are in the game at this time. Unlike No Man's Sky, this is not claiming to be a finished and feature complete final product.
obvious i seen videogames years after their release still being in alpha stage, it's just a cheap word to be lazy and not be accountable for all that's wrong.
for example star citizen would be alpha forever the universe would sooner end then that game would be released.
and what's the big deal many company's have moddable support alone their games or console commands along their alpha product. it's not like something impassable.