Here is the full list of all 13 Teal achievements.
Win 5 matches without taking any damage
Kill a unit standing inside a shield with the shield
Win 5 matches without losing a single unit
Hit with every shot during a match and win
Lose the first unit in a match and get all upgrades on the map afterward
Kill a unit with melee damage while having a shotgun equipped
Win your first game
Win 5 games
Win 10 games
Win 25 games
Win 50 games
Win 100 games
Win 200 games