Here is the full list of all 53 FALLING OUT achievements.
Open 100 chests
Kill 3 enemies with one dynamite
Spend 500,000 coins in the shop
Kill 10 enemies by throwing your partner at them
Shake off 20 freezies
Save atleast 50,000 coins
Exit 100 levels
Complete any level in co-op
Slip on a banana at least 10 times
Fall down at least 100 times
Pull partner up 50 times
Make Felicie react to your farts at least 100 times
Die a total of 10 times
Die a total of 50 times
Die a total of 150 times
Die a total of 300 times
Kill 5 enemies with a Slingshot
Kill 5 enemies with a Grappling Gun Lv3
Kill 5 enemies with a Bow and arrow
Kill 5 enemies with a Boomerang
Kill 5 enemies with a Frying Pan
Kill 10 enemies with a Mine
Kill 50 enemies with a zapper
Craft a Level 1 item
Craft a Level 2 item
Craft a Level 3 item
Craft a Level 4 item
Craft 50 items
Use the Teleporter 10 times
Achieve a total flying time of 60 seconds with the Jetpack Fly 120 seconds with the Jetpack
Die in the first 10 seconds of a level
Triggered the flood 50 times
Triggered a boulder trap 50 times
Carried your partner for 10 minutes
Use 200 Health Packs
Opened 1000 crates
Kill 300 enemies by jumping on them
Kill 25 enemies
Kill 100 enemies
Kill 500 enemies
Kill 1000 enemies
Fail a level 50 times because your partner died first
Complete the tutorial
Hit opponent player 10 times in VS
Discover 10 hidden secrets in murals
Complete the game in Tourist Mode
Complete the game in Explorer Mode
Complete the game in Badass Mode
Complete all achievements
Kill one of every enemy in Egypt
Kill one of every enemy in Maya
Kill one of every enemy in Antarctic
Kill one of every enemy in Underworld