Blacksad: Under the Skin

GLITCHED (See near the bottom of this description.)

Scattered across the game, there are 100 collectable sports cards, about 25 for each of the four sports in the Hall of Fame. This game has one of the most annoying collections systems. The cards are non-diegetic so they can be anywhere on the maps regardless of how much sense their locations make. Some are in plain sight as you explore the area, however many are in out-of-sight areas that require you to pan the camera, aiming it at out-of-view areas (i.e. far or hidden spaces, at the corners, etc.), or when investigating a hotspot where you can pan the camera around. Some will require you to be in a specific state to be able to pick them up (for example, in the basement of the Chinese restaurant, some cards are only collectible while holding a lighter, and the others are only collectible while holding the flashlight, despite them being found the same area.) 

To make matters worse, there are multiple spawn points for the cards on each map and not all spawn points will have cards. For example, there are 37 areas cards can spawn at on the Dunn's Gym map, but only 24 of these points will have cards actually spawn there at any one time. There are a total of 160 spawn points in the game, and spawn points for each specific card is randomized, i.e. any card can spawn in any of the 160 spots. Once you locate a card, use the  to get the hotspot on the card to pick it up. 

Note: I can confirm after starting with new data that some of the card locations can be glitchy. I can also confirm that unlocking this trophy is based on having all 100 cards on the same save file and not unlocking all other four trophies.

Microïds released their own guide to card spawn locations which includes photos of each possible spawn point: LINK

Here is the breakdown of the maps and number of cards per each map. If you can read through the typos in the document, there are supposedly only a set number of cards that will spawn in each subarea of the map. Testing this myself, the numbers provided in those charts for the subareas is not accurate but so far, the card numbers per map is accurate.

• Dunn's Boxing Gym: 24
• Blacksad's office: 3
• Sam's Diner: 3
• Yale's apartment: 6
• Mary's apartment: 1
• Cardiology department (includes one card in the anteater's room which happens later if you don't find a 6th card while at the hospital the first time.): 6
• O'Leary's hideout(street, restaurant, basement & HQ): 14
• Farnham hotel room: 5
• Dunn's apartment: 9
• Green-wood Cemetery: 4
• Weekly's darkroom: 1
• Pier 36 (ground and roof): 6
• Warehouse and basement: 7
• Thorpe's agency: 11

I'm not sure if the cards are randomized on a fresh new game and remain at the same spawn points in subsequent new games started with old data or if the remaining cards not found get randomized again whenever you start a new game following your first playthrough. From my experience, I suspect it's the latter.

Glitch notes: This trophy is highly unobtainable currently in version 1.02. The guide provided by Microïds is somewhat inaccurate on the break down of each area and how many cards are in each section of the level (that and there's errors some of the tables and paragraphs in the guide provided). I followed the guide multiple times throughout several new playthroughs and was short a few cards every time, typically one card.

I managed to unlock this trophy during my last run with likely a mix of luck and exploiting the differences in spawn locations for the cards between version 1.02 and an unpatched physical copy. The game glitched during this playthrough and did not spawn the 6th card in the pier area and after carefully following the guide, I ended up being 4 cards short (I'm unsure how I missed the other three cards.) I deleted the game, reloaded the disk, and prevented the 13+GB patched from downloading. I reloaded my save to the pier using the chapter select and found the card at a spawn point not listed in the guide (on a box very close to the forklift). Two cards were found in the ally way of O'Leary's hideout (in the fire escape, spawn point TC07 and on the shelf in the basement on the left side, next to the light switch while holding the flashlight which this spawn point isn't in the final guide, not to be confused for TC13 or TC14.) Neither were there when I first played through the level during this run, although there were some glitches where the game kept pointing at card spawn points but the hotspots were empty; I suspect this was caused by playing the game for a long session before getting to this level. My last card was spawned on a file drawer in the corner of Thorpe's office, which isn't a spawn point in the final guide.

This option will likely not be available to most players and is not a guarantee that this method will work for all players. Hopefully, the issues with the spawn points will be fixed if we get newer patches for this PS4 version.