This mysterious 17th century book on alchemy claimed to reveal the secret of the Philosopher's Stone to those who could solve the riddles and ciphers contained within.系统需求最低配置: 操作系统 *: Windows Vista (64-bit) or later 处理器: 2.8 GHz+ 内存: 2 GB RAM 显卡: Shader Model 3.0+ 存储空间: 需要 200 MB 可用空间*2024 年 1 月 1 日（PT）起，Steam 客户端将仅支持 Windows 10 及更新版本。