The term "alpha version" refers to an initial, early stage of a software or product that is still being developed. It is the first version created for testing and improving before the final release. Full definition
The studio has already attracted enough funds to get the game into alpha status, and has released playable alpha versions of the game on the PC. (nintendotoday.com)
(Early alpha version) Simple file browser with cut, copy and paste actions. (slideme.org)
There you can download the current alpha version of the program and make various basic changes to the game if you're so technically inclined. (gamingreinvented.com)