Free as part of GOG's "winter sale".
To claim the freebie: Click "Get it FREE" in the Tower of Time banner on the GOG homepage. (You may have to scroll the page to find it.)
A new kind of RPG awaits you. A story-rich dungeon crawler with innovative real-time combat that lets you pause or slow time. Tactical thinking is essential to succeed. Enter the mysterious Tower of Time and experience the incredible adventures that lie within.
Tower of Time is an incredible adventure packed with over 50 hours of gameplay, hand-crafted levels, and a rich story told through cinematics. Taking classic RPG gameplay to the next level, Tower of Time features flexible character development, thousands of pieces of loot and equipment and the complex and tactical Arrow-Time real-time combat system.
For reviews or more info about the game: game page on GOG, game page on Steam.