Saw that no online site had the missable achievements guided, so I felt I'd just make one myself! Please enjoy and rate up if this helps you!
If you're looking for full-game guides to help you get through the game quicker, here's a good one for the first game[gamefaqs.gamespot.com] (not perfect but pretty dang good), and I'm working on my own text guide for the second game!
These achievements are simply for playing through each episode, nothing special needs to be done for these.
The Great Ace Attorney: Adventures Defence Debut - Complete Episode 1
Crash Course Candidate - Complete Episode 2
The Realm of the Reaper - Complete Episode 3
Landed in London - Complete Episode 4
Fleeting Farewell - Complete Episode 5
The Great Ace Attorney 2: Resolve Susato's Success - Complete Episode 1
The Key of Knowledge - Complete Episode 2
The Demasking - Complete Episode 3
The Legendary Pair - Complete Episode 4
The Risen Resolve - Complete the Final Chapter
Extras Ace Aficionado - Complete the extra Escapade adventures
Note For The Multi-part Achievements
You are able to see your progress (and which ones you may have missed) for "The Top Rung", "Herlockian", and "Ace of Spades" in the 'Accolades' section of 'Special Contents' in the main menu. This can make it much easier to track exactly what you need.
The Great Ace Attorney: Adventures
Episode 1 Prime Presser - Successfully press a witness during the first cross-examination. This is basically storyline, but if you just present evidence without pressing you will miss this.
Inconsistency Seer - Successfully present evidence during the first cross-examination (Basically storyline)
Healthy Curiosity - When you receive the medical report card in your Court Record, make sure to inspect every point of interest (one on the front, one on the back, and one inside once you open it). You recieve the card during Trial, Part 1 but you should be able to inspect the card throughout the trial.
Episode 2 Pillow Perfectionist - During Investigation, Part 3, you will be tasked with finding where Kazuma was looking during the second "Dance of Deduction". This will be the last decision of the episode . During this time, you can inspect the bed in the area. Even though you can see beds earlier in the case, you cannot inspect them at that time.
Episode 3 Hat Hunter - During Trial, Part 3, you will get this achievement by pressing the third statement of the testimony "Rebuttal to the Accusation". Make sure you question Magnus when he reacts .
Episode 4 Second-Rate Strings - During Investigation, Part 1: Sholmes' Suite, you'll be greeted by Iris Wilson. Before conversing with her, examine the room and scroll to the left to inspect the violin. You must do this before talking about the 'Wilson' topic, or you won't get the achievement.
The Herlockian (1/7) - You must also inspect the blackboard on the right side of the scene before talking about the 'Wilson' topic, (same time as when you earn Second-Rate Strings), and you will read that Iris is working on something called 'Black Peter' (but she won't talk to you about it, yet).
The Herlockian (2/7) - After you talk to Iris about the 'Wilson' topic, inspect the blackboard again and Iris will talk to you about 'Black Peter'.
Episode 5 Ace of Spades (1/8) - You start the episode in Naruhodo's Legal Consultancy, and you can inspect a shovel (not a spade, as Naruhodo is told by Susato).
The Woman...? - Upon starting Episode 5, you can move straight to Sholmes's Suite and inspect the fireplace after the initial dialogue ends. When Susato finishes talking about the fireplace, the achievement will pop.
The Herlockian (3/7) - You can inspect Iris' blackboard right after earning The Woman...?, and you will converse with Susato about 'The Boscombe Valley Mystery'.
Ace of Spades (2/8) - At the start of Investigation, Part 3, you will be in Naruhodo's Legal Consultancy with Iris. Simply inspect the shovel the same way you did at the beginning of Investigation, Part 1 to be corrected about whether it is a shovel or a spade.
The Herlockian (4/7) - At the start of Investigation, Part 4 you can move around with Iris and not Susato. After talking to Detective Gregson, you can move to Sholmes's Suite to converse with Iris about 'The Boscombe Valley Mystery'.
Sulky's Story - During Trial, Part 1 (or theoretically any other testimony throughout the case where the Skulkin brothers are talking) simply press them on a statement and use the "pursue" feature on the brother that isn't talking. You have to do this once for each brother, I personally pursued Ringo on the 2nd statement of the first testimony and Nash on the 4th statement of the first testimony, but there are plenty more opportunities.
The Great Ace Attorney 2: Resolve
Episode 1 Father Frustrator - During Trial, Part 1 you will be asked to name the victim. Incorrectly claim that the victim is Taketsuchi Auchi (the prosecutor), then Yujin Mikotoba (your dad), and the achievement will pop.
Episode 2The Herlockian (5/7) - As soon as you gain control in Sholmes's Suite, inspect the blackboard to talk to Iris about 'The Blue Carbuncle'.
Ace of Spades (3/8) - As soon as you talk to Iris for Herlockian progress, move to Naruhodo's Legal Consultancy and inspect the shovel.
The Herlockian (6/7) - After you get automatically moved to Miss Green's Hospital Bed for the flashback, go straight back to Sholmes's Suite and inspect the blackboard again for different dialogue with Iris.
Down in One -
The Noodler -
Ace of Spades (4/8) -
Episode 3The Herlockian (7/7) -
Ace of Spades (5/8) -
Ace of Spades (6/8) -
Ace of Spades (7/8) -
Inspirational Roots -
The Top Rung (1/2) -
The Top Rung (2/2) -
Episode 4 Ace of Spades (8/8) -
Best Chips in Town -
Final Chapter Asogi Clan Appreciator -
Bespoke Tailor - Play the second game with all of the alternate outfits. You can see a checklist in the 'Accolades' section of the 'Special Contents' menu. If you select all of the secondary costumes before launching the second game, this achievement will pop as soon as you start the second game.
The Great Ace Attorney - For obtaining all other achievements
More The Great Ace Attorney Chronicles guilds
- Restoring Herlock and Wilson back to Sherlock and Watson (+ More!)
- The Great Ace Attorney: Adventures Walkthrough
- Nintendo Switch button mod
- TGAA Japanese Subtitles Patch for Worldwide Version [Mod]
- Fix for various issues in the PC port.
- How to uncap the FPS and make it higher than 30FPS.
- (W.I.P) All Achievements for The Great Ace Attorney Chronicles (Part 1: Adventures)
- [WIP] Step-by-step guide for The Great Ace Attorney 2: Resolve
- TGAA HQ Audio Restoration Patch [Mod]