MetroidMaster1914 of the Metroid Headquarters has organised their second annual Metroid marathon, known as MHQthon 2012. The marathon will be streamed live from their website, and will feature players speed-running through all 11 Metroid games in the main series.
As a fund-raising event, any donations earned throughout the marathon will be given to Child's Play, an organisation that aids sick kids by providing video gaming consoles and games to hospitals and therapy centres.
The event begins at 8pm CDT this Friday, 13th July (which in GMT is 1am on Saturday 15th July). There's no set finish time for the marathon, so be sure to join in and support the cause before it ends!