Here is the full list of all 78 BADLAND: Game of the Year Edition achievements.
Complete Day I in coop
Lose 250 clones to circular saws
Lose 100 clones by squashing
Lose 100 clones to circular saws
Miss 20 clone powerups while some player is dead in coop
Lose 1000 clones in coop
Explode 100 mines in total
Lose 500 clones in coop
Play multiplayer
Complete all the dawn levels in Day I
Complete all the noon levels in Day I
Complete all the dusk levels in Day I
Complete all the levels in Day I
Complete all the dawn levels in Day II
Complete all the noon levels in Day II
Complete all the dusk levels in Day II
Complete all the levels in Day II
Complete all the levels in Doomsday
Complete all the levels in Daydream
Complete 40 levels with one try
Complete 80 levels with one try
Complete all Doomsday levels with one try
Complete all Daydream levels with one try
Save 100 clones in total
Save 200 clones in total
Save 300 clones in total
Save 400 clones in total
Save 500 clones in total
Save 600 clones in total
Save 700 clones in total
Save 800 clones in total
Save 900 clones in total
Save 1000 clones in total
Save 1250 clones in total
Save 1500 clones in total
Save 1750 clones in total
Save 2000 clones in total
Save 2500 clones in total
Save 3000 clones in total
Complete 30 missions in total
Complete 60 missions in total
Complete 90 missions in total
Complete 120 missions in total
Complete 150 missions in total
Complete 180 missions in total
Complete 210 missions in total
Complete 240 missions in total
Complete 270 missions in total
Complete 300 missions in total
Lose 250 clones by squashing
Play 100 multiplayer rounds in total
Complete Day II in coop
Complete Doomsday in coop
Complete Daydream in coop
Save 500 clones in total in coop
Save 1000 clones in total in coop
Save 2000 clones in total in coop
Save 3000 clones in total in coop
Complete 120 missions in coop
Complete 240 missions in coop
Complete 270 missions in coop
Complete 300 missions in coop
Save over 20 more clones than your friend in coop
No one dies and no clone powerups collected in level High Speed
Spend over 15 minutes in the level Verticality in coop
Miss all decrease size powerups in th elevel Clonefest in coop without dying
Play 10 hours in total
Complete the level Flaw with the chained character
Save two clones in the level Final Frontier
Explode the hidden mine in the level buttons
Do not stop time in the level Flipping
Save two clones in the level Oblivion
Complete Blockworks with all fast forward powerups
No one dies in level Clonetron in coop
Explode the hidden mine in the level Switch
Press two buttons inb the level Hypersonic in coop
Play 10 levels in the Level World