Here is the full list of all 23 Glare achievements.
Kill 20 enemies with reflected bullets
Kill 20 enemies using the environment.
Complete Desert World.
Complete Tree World.
Kill 5 enemies within 3 seconds.
Collect all four artifacts in Tree World.
Collect all four artifacts in Desert World.
Collect all four artifacts in Pillar World.
Collect all four artifacts in Ice World.
Collect all four artifacts in Lava World.
Collect every artifact in the game.
Complete Pillar World.
Complete Ice World.
Complete Lava World.
Stop the Ramora invasion.
Complete Tree World in under 9:30.
Complete Desert World in under 14:00.
Complete Pillar World in under 12:30.
Complete Ice World in under 18:00.
Complete Lava World in under 13:30.
Complete Toric Caster in under 4:30.
Complete every world’s time challenge.
After starting a new game, complete the entire game without dying or switching levels in the menu.