Give Allen some hope before he goes - On the ledge, inquire about why he's on the ledge. Ask about his wife. Tell him his wife is inside. Then, contrary to what you might expect, have Rosa tell him she was right to leave him.

Have a few drinks, but you might regret it in the morning - At the Park Gallery, when you're on your way out, you're asked to stay for drinks. Choose to stay.

Keep a clear head, but others might think less of you - At the Park Gallery, when you're on your way out, you're asked to stay for drinks. Choose to leave.

Distract the cat only once - When it's raining, enter Monique's office. A cat will come inside and lay on the chair. Have Joey go over to the cat and play with it. Then immediately switch to Rosa and click on the cat. You MUST click on the cat while Joey is playing with her for this to count. Save before attempting, just in case!

TIP: Position Rosa right near the cat before switching to Joey. To save even more time use the TAB key to swap back to Rosa.

While holding Frank's script, get though a performance without flubbing a single line - DO NOT TALK TO FRANK WITH ROSA UNTIL YOU HAVE BEEN TO HIS APARTMENT! Once you've obtained the script, talk to him with Rosa and recite the appropriate lines back to him. The only tricky part is the 2nd answer where you must "Tell him he's dead" in order to recite the appropriate line.

A cheat sheet has been included below for your benefit.

Convince Claude that you are an artist on your first try - If you're not looking for the easy way out, Oogle "Artists" on Rosa's computer and follow the advice. If you are looking for the easy way out, follow the guide below.

• Painting 1: Say you like the hard lines.
  
• Painting 2: Ask if it represents Darkness in Shadow.
  
• Painting 3: Ask about the color.

Note: The achievement says Frank, but they mean Claude, the artist, not Frank the dead actor. :)

Save Charlie Meltzer's life - Take your ghostly cigarette and click on the Countess when she's attacking Charlie. I don't think you can miss this one actually.

Defeat the Countess with one throw of an improvised lasso - When the Countess is attacking Joey, he will drop his tie. Use Rosa to pick up the tie, then click on the tie in your inventory. Once you have the Tie selected WAIT for the Countess to raise her fist back, a *woosh* sound effect will play. This is when you want to click on the Countess with the Tie. You will lasso her. Then swap to Joey and click on the Countess. The achievement should pop if you managed to do this all on your first try. Save before attempting, just in case!

TIP: To save even more time hover the Tie over the Countess and wait for the animation, click, then use the TAB key to swap to Joey.

Finish the game at least once - If I have to explain to you how to unlock this, you need more help than my Achievement Guide can provide.

Finish the game without asking Joey for a single hint - Don't be afraid to talk to Joey. Joey is your friend. He is hilarious. You can chat with him, you can go over your notepad together, you can even play as Joey and talk to Rosa. What you SHOULDN'T do is choose the 3rd option and ask about what your next move should be. That's the Hint button you want to avoid using otherwise you'll lock yourself out of this achievement.

Finish the game in commentary mode, from the opening menu till the end - Self explanatory. Before you start a new game, turn on the commentary. Don't turn it off. Complete the game. I recommend saving this for a second playthrough so you can actually enjoy the main plot and dialogue without breaking your immersion.

Find the secret extras menu - In order to get this achievement you'll need access to Oogle on Rosa's computer. This means you want to have a save file BEFORE you leave the apartment to rescue someone from a vengeful ghost. Otherwise, you'll have to replay the tutorial. The code in question can be found at the end of the credits. If you're too impatient to wait for the credits, or forgot what the code was, I've included it in the image below (you're welcome by the way, I couldn't find this code ANYWHERE on the Internet and had to rewatch the credits. I even Oogled it!)