While the full game requires payment, there are legitimate ways to try it or find lower prices:

: The best way to get the full game at a lower cost is to wait for major sales. It frequently goes on sale during Steam's seasonal events, such as the Summer or Winter sales.

: You can occasionally find the game as part of a bundle or at a discounted price on Humble Bundle, which also provides a DRM-free version for Windows. Warning Against "Free" Downloads