Case T-172/21: Judgment of the General Court of 27 September 2023 — Valve v Commission (Competition — Agreements, decisions and concerted practices — Market for PC video games — Platform — Decision finding an infringement of Article 101 TFEU and Article 53 of the EEA Agreement — Restriction of parallel imports — Concepts of ‘agreement’ and ‘concerted practice’ — Restriction of competition by object — Copyright)