Simply play the game for 20 minutes without pausing or running out of fuel.

Simple, You will get this achievement by playing the game for the first time

Orange Mower

Drive 4,000

Sweeper

Drive 8,000

Turbo Mower

Drive 16,000

As you start the game, turn right and move towards the building in the picture below

Go to the back of the building and there's and entrance, with the flag inside

Drive into it to get the achievement

From the flag, keep driving right until you see this building in the picture below

Drive behind it, and the golden grass should be right there

Drive into it to get the achievement

Start the game and drive to the right, you should see the snowy mountains like in the picture below
You should see some pink text that says "SECRET SNOW AREA", drive there and get the achievement

Thanks for checking this out.

Thanks to the dev for this 11/10 game <3