Gang Beasts

You need to survive from being in the water on the Buoy stage
Jump into the water
Climb back up by holding the ice with LB + RB
Then keep jumping (A) until you're back up

This is my full 100% Achievement Walkthrough, all solo methods
You only need an extra controller for the football achievement
I also teach you how to play

Timestamps:
Achievements: 00:35
Customize: 2:00
How to play: 2:50
Short Wave: 4:10
Drop Kick: 4:55
Big Head: 4:55
Roast Beef: 6:15
Safety Warning: 7:35
Sea Legs: 8:00
Buoy o Buoy: 8:00
In Transit: 9:30
Keep on Trucking: 9:30
Long Haul: 9:30
Bucket List: 11:10
Self Storage: 11:45
Special Delivery: 11:45
Ground Floor: 13:20
Hang Tough: 15:15
Step Down: 16:30
Sit Down: 17:35
Shutout: 18:30

Upvotes appreciated

This achievement was very buggy and glitchy for me and it did not pop after trying on an off for months but here is my solution:
USE LB AND RB TO CLAMP ONTO ICE AFTER JUMPING INTO THE WATER and SWAP HANDS TO CLIMB BACK UP.
Before fully coming back onto the iceberg , Hold A and Release and repeat so you DIP YOUR FEET INTO THE WATER A COUPLE OF TIMES.
This took me only about 4 tries and it finally popped
Hope you all get it since glitched achievements are a pain in the behind

This achievement seems to be bugged to no end, but the method I used involved falling 2 times into the sea. I kept the A button pressed after falling so I could stay afloat, moved onto the ice, picked myself up, then fell again, rinse and repeat.

Everyone seems to say it's bugged and I believe them, given that I spent all of the previous day trying to get just this and no luck.

Set game mode = Melee
Wins = 8 (this gives you maximum amount of tries before taking you back to main screen)
Stage = Buoy

Drop into the water and climb back out by grabbing the ice or the buoy and press and hold LB to grab and hold with your left hand and press A to pull yourself up then press RB to grab and hold with your right hand and press A to pull yourself up - takes a bit of practice to get used to the controls in this game but once you master it the other levels are easy too.

The Achievement guide below will walk you through this achievement and all 18 others achievements in the game too including an easy method for getting the most difficult one in my opinion (Sit Down achievement).

Timestamps are shown below the video.


ACHIEVEMENTS LIST TIMESTAMPS:
0:00 Intro and game set up
0:35 - Welcome to Beef City Achievement
1:30 - Safety Warning Achievement
2:35 - Bucket List Achievement
3:15 - Roast Beef Achievement (demonstrates how to climb and fight as well)
6:05 - Sea Legs Achievement
7:27 - Buoy o' Buoy Achievement
8:30 - In Transit Achievement
9:10 - Keep on Trucking Achievement
10:00 - Long Haul Achievement
11:12 - Self Storage Achievement
12:12 - Special Delivery Achievement
12:58 - Ground Floor Achievement
14:30 - Hang Tough Achievement
17:09 - Step Down Achievement
18:08 - Drop Kick Achievement
18:08 - Short Wave Achievement
19:35 - Big Head Achievement
19:35 - Shutout Achievement
21:10 - Sit Down Achievement