Here is the full list of all 23 Smalland: Survive the Wilds achievements.
Collect chitin
Collect stone
Sleep in a bed
Claim a tree
Meet the Elder
Tame any creature
Collect a metal piece
Find the Witch, Tuhala
Collect bones
Collect silk
Meet with Nok
Glide for the first time
Find the key for the walnut chest
Collect Pyrite
Meet the Historian
Meet the Merchant
Collect a Feather
Meet with Malik
Collect Icarus Wings
Meet with Granger
Collect Firesand
Meet with Sarnak
Collect a Snake Fang