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