Steam now requires age verification to view mature content in the UK

Valve is enforcing age verification checks on Steam for some users. If you're in the UK and you want to check out a game that's rated mature - intended for people over the age of 18 - you'll need to provide Valve with proof of your age. Steam is the latest in a swathe of websites to implement similar measures in order to comply with the UK Online Safety Act, which aims to "protect children and adults online."