How Do I enable "Slow"/"Slower" game speeds?

Testing Game Speeds with [difficulty].

Game speed options change with the expansions. Man this makes my head spin. On Terans you can go to slower - on the others you cannot.

Wings of Liberty

  • [Casual] slower, slow, normal, fast, faster
  • [Normal] Slower, slow, normal, fast, faster
  • [Hard] fast, faster
  • [Brutal] no option – assume faster

Heart of the Swarm / Legacy of the Void/W.o.Oblivion

  • [Casual] slow, normal, fast, faster
  • [Normal] slow, normal, fast, faster
  • [Hard] fast, faster
  • [Brutal] no option – assume faster

Legacy of the Void - Main Story/Epilog – Nova

  • [Casual] slow, normal, fast, faster
  • [Normal] normal, fast, faster
  • [Hard] fast, faster
  • [Brutal] no option – assume faster

TL/DR @Kyrie Starting with Legacy of the Void Main Story slow mode is no longer available. Slower mode only for the Terran missions. Slow for Heart of the Swarm – This is not really intuitive and caused me some headache.