Old Man's Journey

This achievement can actually be unlocked in any of the levels with sheep, of which there are at least three. The first and easiest place to get this is immediately after you get off the train. Walk to the right to pan right and you'll see a herd of sheep. To unlock this achievement, you need to get past them using the minimal number of moves possible. Here's what to do:

1. Click on the sheep to move them right to the next green patch.
2. Click on the very right side of the green patch they were on, so that you walk up close to them. The screen should pan right.
3. Click on the sheep to send them right to the next green patch.
4. Once again click on the right side of the green patch they were on to move right behind them. The screen should again pan right.
5. Click on the sheep to move them right, to the middle of three green patches.
6. Click behind them to move behind them.
7. Click on the sheep to move them right, to the rightmost green patch.
8. Click on the land in the background with the rock wall so the old man goes onto that land behind the sheep.
9. Click on the sheep so they move left to the center green patch, opening up a path for you.
10. Click on the right side of the screen to walk past the sheep and to the next screen, completing this portion.

Following the above steps will get you past the sheep in the minimal number of moves and unlock this achievement.