The Adventures of Tintin The Secret of the Unicorn - The Game

This achievement is story-related, and will be unlocked once you complete the entire Tintin Mode (i.e., the story mode of this game). Technically, it's an obligatory "complete the game" achievement found in many other games.

This level is just like most other levels - some platforming, beating some thugs and solving some simple puzzles. I encountered a glitch, however, after beating out the thugs towards the mid-end of the level. Upon doing so, the game should move on to the last fight of the game against the "final boss" (don't worry, it's a simple fight). However, the next level didn't load, and I was stuck in the mansion. If you encounter this, simple quit and reload last checkpoint, and you should be fine to continue.

The achievement will unlock before the end credits.