The following section contains information from a previous version of StarCraft II: Heart of the Swarm which is no longer valid.
Mutagens were collected by Sarah Kerrigan's zerg throughout the StarCraft II: Heart of the Swarm single player campaign. She could use them to purchase upgrades to specific zerg units. It is collected from various creatures in missions. Abathur directed this process at the evolution pit.
Mutagens were cut from the game, as developers felt it was too similar to the game mechanics of Wings of Liberty. A new system was developed where zerg upgraded over time, leading to an evolutionary branch a player could choose with a specific mission.
- ↑ 1.0 1.1 StarCraft Legacy staff. 2011-05-30. May 2011 HoTS Gameplay Info. StarCraft Legacy. Accessed 2011-05-31.
- ↑ 2011-05-31, Blizzard Insider Interview With Dustin Browder. Blizzard Entertainment, accessed on 2011-07-08
- ↑ 2011-10-22, BlizzCon 2011 - Starcraft 2: Heart of the Swarm - Campaign and Lore Panel (Full). YouTube, accessed on 2011-11-07