Here is the full list of all 12 Everlife achievements.
Earn a champion rank on Murky Mansion in normal mode
Stun the ghosts 5 times in Murky Mansion in one game on normal mode
Beat Murky Mansion without using the stunner in normal mode
Discover all 5 portrait secrets in Murky Mansion (Via Stunning)
Earn a champion rank on Tsundere Terror in normal mode
Neutralize The Tsunderes' abilities 3 times in one game on normal mode
Collect the star in Tsundere Terror without being spotted by The Tsunderes in normal mode
Beat Tsundere Terror without using the detector in normal mode
Earn a champion rank on Game Grievance in normal mode
Beat Game Grievance without disarming a glitch gate in normal mode
Survive after collecting the star in Game Grievance until all the explosive arcade machines have gone off in normal mode
Complete an arcade game in Game Grievance