Here is the full list of all 19 Glow achievements.
Gather 15 Minions at the same time
Reach a CR of 300
Kill 5,000 Spiders in Total
Reach a CR of 250
Gather ten Minions at the same time
Reach a CR of 200
Gather five Minions at the same time
Unlock all Perks
Reach a CR of 150
Kill 1,000 Spiders in Total
Reach a CR of 100
Survive a Map with less than 5 Hit Points
Kill 250 Spiders in Total
Reach a CR of 50
Kill 100 Spiders in Total
Kill 25 Spiders in Total
Find the hidden Cloverleaf
Survive the first Map
Kill you first Spider