Here is the full list of all 28 Lazors achievements.
Complete all Split levels.
Complete all Positive levels.
Complete all Déjà Vu levels.
Complete all Additional levels.
Complete all Plus levels.
Complete all Wormhole levels.
Complete all Teleport levels.
Complete all Portal levels.
Complete all Elementary levels.
Complete all Glassware levels.
Complete all Tinier levels.
Complete all Diamond levels.
Complete all Prismatic levels.
Complete all Crystal levels.
Complete all Grande levels.
Complete all Crossed levels.
Complete all Darkroom levels.
Complete all Numbered levels.
Complete all Diagonal levels.
Complete all Showstopper levels.
Complete all Tiny levels.
Complete all Yarn levels.
Complete all Mad levels.
Complete all Braid levels.
Complete all Tricky levels.
Complete all Vertices levels.
Complete all Friendly levels.
Complete all Tutorial levels.