Full list of all 41 Grounded achievements worth 2,800 gamerscore. It takes around 0-0.5 hours to unlock all of the achievements in the base game on Xbox One.
The base game contains 20 achievements worth 1,000 Gamerscore, and there are 4 DLC packs containing 21 achievements worth 1,800 Gamerscore.
Save BURG.L after the Oak Tree Lab explosion
Complete the Hedge Lab
Complete the Pond Lab
Purchase your first upgrade from an ASL Station
Obtain your first Mutation
Analyze 15 resources
Cook a bug on the Roasting Spit
Score a basket with the Basketball Hoop from over 40 cm away
Lounge in a Chair
Perform 10 perfect blocks in a row
Equip a matching set of Tier 2 armor
Craft your first Tier 3 item
Obtain 10 new SCA.B color schemes
Consume 5 Beefy memorized recipe Smoothies
Construct your first Mushroom Brick building
Discover 20 Sites on the Map
Kill your first Wolf Spider
Zip across a teen made Zipline longer than 100 cm
Tame a bug as a pet
Kill the Broodmother
Plug the Haze canister
Complete the Black Ant Hill Lab
Infuse yourself with 20 regular Milk Molars
Achieve level 10 Brainpower
Upgrade a tier 3 item to the max level at the Smithing Station
Kill a flying bug with an arrow from over 30 cm away
Snap a picture using Photo Mode
Craft tier 3 arrows
Find Dr. Wendell Tully
Kill the Mant
Kill the Mantis
Successfully brew the Embiggening Cocktail
Unlock every Creature Card
Foil Director Schmector
Defend all of the MIX.Rs and Super MIX.Rs
Grow big again!
Grow big again and score 100% on the end game Report Card
Kill the Wasp Queen
Duplicate an item at the Super Duper
Unwind at a base while experiencing max coziness
Kill the Infected Broodmother