The obvious easy way to doing this achievement is by playing on EASY action level, and EASY riddle level. Also using the Unlimited Sub Machine Gun will help as well..
The problem to doing this achievement can be the current bug where the game freezes during gameplay, which means you have to really hope that your game doesn't freeze, or put your saves in reasonable places.
For me, I used my first save when I had gotten the kerosene in the underground tunnel, right before reactivating the machine and draining the water.
The second save was when I arrived at the amusement park. The amusement park level is short, and it's all that remains with the church level being the final level.