The Spark of Madness Add-on for Dead by Daylight (Win 10) has 4 achievements worth 60 gamerscore.
In public matches, hit survivors 500 times with The Doctor's Electroconvulsive Treatment attack.
In a public match, bring the 4 survivors to insanity Tier 3 at least once in the same match.
In a public match, achieve a merciless victory with The Doctor using only his 3 unique perks.
In a public match, escape with Min using only her 3 unique perks.