Here is the full list of all 26 Lightyear Frontier achievements.
Explore the vault in Outset Grasslands.
Plant 1000 seeds.
Explore 7 ruins.
Build the radio tower.
Restore all regions in Outset Grasslands.
Remove 700 Noxious Weeds.
Remove 150 Noxious Slimes.
Increase Homestead Coziness to 3.
Plant 500 seeds.
Remove 300 Noxious Weeds.
Get 10 upgrades at the Upgrade Depot.
Remove 100 Noxious Weeds.
Remove 50 Noxious Slimes.
Feed 50 animals.
Plant 100 seeds.
Increase Homestead Coziness to 2.
Get an upgrade at the Upgrade Depot.
Feed 20 animals.
Scare away 10 animals.
Feed an animal for the first time.
Restore a region.
Explore a ruin.
Remove 10 Noxious Slimes.
Plant your first seed.
Increase Homestead Coziness to 1.
Spray water at another player.