The Basic Edition is a free download that works immediately after installation. Product keys are only required if you want to upgrade to:
Superposition is the successor to the famous and Valley benchmarks. It is significantly more demanding and better suited for modern hardware, though some users still prefer Heaven for long-term stability testing because its free version can loop indefinitely. Superposition benchmark - UNIGINE Benchmarks superposition benchmark product key free work
Understanding the version differences is crucial to answering the "free work" question. The Basic Edition is a free download that