The most complete version, featuring the base game plus all six DLC expansions (Jungle Awakens, Creeping Winter, Howling Peaks, Flames of the Nether, Hidden Depths, and Echoing Void).
If you decide to go beyond the base game, there are several versions available: Includes the base game.
Mojang offers a free trial version that allows you to experience a limited portion of the game to see if it runs on your system before committing to a purchase.