You can purchase the game on Steam and test it for up to two hours; if it doesn't meet your expectations, you can request a full refund.
The game joined the Xbox Game Pass library for PC and console, allowing subscribers to play at no additional cost. Dune: Spice Wars Free Download (v0.4.16.21651)
While there is no permanent "free" version of the full game, there are safe, authorized ways to play: You can purchase the game on Steam and