You can find it on Big Fish Games and MacGameStore .
While the query mentions a "free download full version," the game is officially licensed as . This typically means a free trial or demo is available, but the full version must be purchased. mystika-2-the-sanctuary-pc-game-free-download-full-version
Free demos (roughly 53 MB) are available to try before buying. System Requirements The game is designed for older and entry-level hardware: OS: Windows XP/Vista/7/8/10. Processor: 600 MHz to 1.0 GHz. RAM: 256 MB to 512 MB. Storage: Approximately 57 MB to 100 MB of hard drive space. You can find it on Big Fish Games and MacGameStore