Medusa V

Medusa V was a massive narrative campaign created by Games Workshop for their Warhammer 40,000 setting, that started in late June 2007. The campaign revolved around the planet Medusa V, a planet that was targeted by a Chaos general and was threatened with an oncoming warp storm. While the mission of the Space Marines is to stop Ygmethor. space marines are various Warhammer races trying to obtain the Nemesis Crown in all-out warfare, similar to the "Fall of Medusa V" Warhammer 40,000 online campaign, and previous Warhammer online campaigns, such as "Dark Shadows" and the "Storm of Chaos".

Background
The plot focuses on the eponymous "Nemesis Crown", a crown forged of warpstone that can grant the power of the Master Rune of Ages to the wearer. The crown was created by dwarven runesmith Alaric the Mad and, according to the campaign's narrative, was buried underneath the Great Forest of the Empire until a mighty earthquake shook open the hiding place. A group of dwarvern miners was sent to investigate the earthquake, but all but one dwarf was killed. The survivor went mad and, after being captured and tortured by night goblins, divulged the location of the crown. Now, rumours of what has been uncovered have spread to all corners of the Warhammer world and scouting parties scour the woods searching for the lost artifact.

Necron
The Necrons aim to construct a Null Warp shield generators to form a shield around the planet, protecting them and their Ctan masters from the effects of the warp and allowing the Ctan to freely feast upon the essences of the world.

Dark Eldar
The Dark Eldar hope to enslave any of the evacuating refugees in order to increase their statuses within Comorrach.