The game is free-to-play with optional microtransactions.

Players pick characters from Diablo, StarCraft or Warcraft and engage in team-based battles. Heroes of the Storm, if you're not aware, is a MOBA in the same vein as Dota 2 or League of Legends. Evidence suggests that Blizzard will be selling Founder's Packs with beta keys in time as well. You can get a chance at an invite by opting in through the Beta Profile Settings on your account.

However, Blizzard is inviting more and more testers over time. The Heroes of the Storm alpha is currently limited to a small number of players. Never fear: the new matchmaking system will quickly learn the skill of the players actively playing games and we’ll soon return to a period of harmony and balance where players will again be matched against players of similar skill.' As a result, there will be a short period of time initially where the new system will need to learn the skill of the players actively playing games, and since everyone will be starting fresh, matches could be a little less than optimal at first. 'The matchmaking rating that we use to match players against equally skilled players will also be reset.