This is how he offers to discover a new level of his own in DOOM II, in exchange for a donation of five euros. All funds raised will then be donated to the Red Cross and the Central European Union Emergency Response Fund.
named One Humanity, this brand new level can be downloaded directly from John Romero’s site, subject of course to the said donation of five euros. If the heart tells you to embody the DOOM Guy once more and kill the demon with Super Shotgun shots for a good cause, go to the site in question, quoted in source below.