Blacksad: Under the Skin

After you meet Spannow in the cemetery for the "Play Baseball" achievement, you'll meet with Weekly to look at his photographs and learn some information. While interviewing Helen Moore, you'll only be able to ask her one question before she leaves, so ask whichever you're more interested in first. The things you ask don't really seem to lead to anything important and the photos you need to take will be very obvious, so there's nothing to really watch out for in this section.

After the photos, you'll end up at La Iguana. There's nothing very dangerous here, but a lot of opportunity to feel like you're making a fool of yourself. Dropping the act is safe and seems like the better option to me. The conversation path that felt least foolish to me was saying O'Leary is your enemy, then any option about Quince, then saying you want to work with him, then threatening to reveal his connection with O'Leary. (I know that seems like a bad idea, but every other option Paulie just laughs at you.)

In a bit, you'll follow the suspect to a meetup where he'll talk with a horse. Use your senses to look at the gun and listen to him talk, then he'll leave with the guard having orders to kill you. If you look at the guard again you have no options but to look at the gun, but if you move the camera a bit you can look at the ledge above him.

Then you're in an alley; you have to walk all the way back up the alley, around the corner (the only card I found in this section is near the corner), and all the way to the pallet forklift, which you then drive all the way back to the alley. Don't ask me why you have to manually walk all this way when Blacksad would have passed it on his way to where you started.

On top of the roof, if you leap on the guard he'll kill you. You have to choose to stay put, then slide back to the right and climb the ladder. You can interact with a shield, which will lead to a cut scene and this achievement.