Context

osk is the developer of TETR.IO [1] (from which the screenshot was taken [2]).

References
  1. Type: Screenshot. Publisher: “TETR.IO”. Accessed: 2025-10-23T00:08Z. URI: https://tetr.io/about/.

  2. Type: Screenshot. Publisher: “TETR.IO”. Accessed: 2025-10-13.