Wildcard Studios occasionally runs on Steam. During these 48–72 hour periods, you can download and play the full game for free. After the event, you lose access unless you buy it.
Note: This article is written for informational purposes. As of the current market status, is a paid title. The write-up below addresses the reality of the game's pricing model while addressing the user's search intent, distinguishing between the "Upgrade" path and the dangers of illegitimate downloads.