Valve Corporation is facing a £656 million lawsuit in the UK over allegations of unfair pricing practices related to its online store, Steam. The lawsuit, initiated by Vicki Shotbolt in 2024, claims Valve uses its market dominance to impose restrictive terms on game publishers, preventing them from offering lower prices on competing platforms. The legal documents allege Valve charges an excessive commission of up to 30%, resulting in inflated costs for UK consumers. This case is a collective action that could affect up to 14 million Steam users in the UK. Additionally, Valve is facing a separate consumer action case in the United States filed in August 2024. Steam, launched in 2003, has become the largest distribution platform for PC gaming, with over 19,000 games released in 2025, generating £8.6 billion in revenue. Valve has also introduced hardware like the Steam Deck and announced plans for the Steam Machine console.