Several games will offer limited DLC, and a Steam sale will be held, all to support the Armistice fundraising initiative from charities War Child and Children in Conflict.
Held to coincide with the 100th anniversary of the end of World War 1 on November 11, Armistice aims to encourage peaceful gameplay, and raise money for the anti-war charities.
Steam is offering a selection of (extremely good) games for up to 75% off this week, with a percentage of the proceeds going to charity.
Several games will also offer Armistice DLC or promotions. Aardman-animated World War 1 game, 11-11: Memories Retold will offer a £2.99 DLC pack featuring actress Carey Mulligan, with all proceeds going to War Child.