Blizzard has outlined a number of features included in its MOBA, Heroes of the Storm, ahead of the game's closed Alpha.

Heroes of the Storm will feature a free weekly rotation of five heroes, Blizzard has announced.

Once players reach level 7, they will unlock an additional hero rotation slot, said community manager Vaeflare. Players can then use in-game gold to purchase any characters they like.

The rotation will change over every Tuesday, PST.

Heroes have customisable appearances, or "tints". Different tints for each hero are unlocked by completing Hero Quests.

Players who pre-order Diablo III: Reaper of Souls will be gifted Valla the Demon Hunter.

Heroes of the Storm Alpha Walkthrough