Go into an Arms Race or Demolition (ideally Arms Race) on Lake with Easy - Expert Bots

Join the CT side

Go into the house, go up the stairs to the top floor and turn right and go into the lounge and break the window to get onto the roof.

This allows you to take the least amount of damage from the Terrorists.

Once on the roof, get the attention of Terrorists outside and get them to shoot at you until you are under 10hp

Take cover and don't take anymore damage for 30 seconds and the achievement will be awarded.