Set game mode = Football (using 2nd controller but you can do this against AI in any Wave game mode)
Minutes = 2 mins
Stage = Alley
If you are struggling to do this in Wave against the AI and have a 2nd controller you can do this in 2 player mode to make it easier.
Run at the opponent by holding
then just before you get to them press
to jump at them and press AND HOLD
to flying headbutt them. If you knock them out the achievement pops.
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