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