UPDATE 27.12.2021: Four (4) previously broken achievements got removed from the game. They never worked and there was no way to unlock them. I'm leaving the list here for posterity:

• Hangover
  
• The End of a Friendship
  
• Whistleblower
  
• The Colony's Expert

Trivial achievements are marked as [TRIVIAL] to indicate, that you don't have to go out of your way to unlock them, and that they should be come with the natural flow of the game.

All achievements can be unlocked in a single playthrough, and that is the purpose of this guide.

PLEASE SAVE YOUR GAME AS OFTEN AS POSSIBLE

It is very unstable and your progress may become permanently STOPPED.
Sometimes even saving and reloading a game may stop your progress (!).
If you save often, you can always go back to a previous save, when everything worked correctly.

Achievements for collecting stuff.






Just pick up everything you come across and these should unlock naturally.

Should unlock naturally as you follow this guide and progress through the game.


While there are 3 recipes total in the teaser, this achievement currently unlocks after you prepare ANY 3 food items. It can be 3 of the same one, e.g. 3 scavenger sandwiches. After you get a recipe, locate a fire (one is at Diego's camp) and interact with it.

EDIT (21 October, 2021):

Originally posted by JS:

small Update to your guide: The achievement > Master Chef < unlocks only by cooking 3 different cooking recipes. I tried it out today.

Nordmar Soup recipe is a reward for completing Sidequest: A Well Deserved Break. See: The Finnest Drink.


You have to find 3 bowls and urinate in each of them. Urinating 3 times in the same one didn't work for me, although some people have reported that it worked for them.





You have to survive a long fall. Go to this ladder, near the Exchange Zone. Make sure your health is full, and run off the cliff next to the ladder. DON'T JUMP or you will certainly die. This achievement may require equipment, potions, or food that increase your maximum health.


There's way more than 10, they're pretty much everywhere, and they don't fight back.


There is more than 6 wolves in the teaser. If you're having trouble, wait until you have a decent sword (the amulet and the ring make it even easier).


Again, there is more than 5. If you're having trouble, wait until you have a decent sword (the amulet and the ring make it even easier).

After watching the intro you gain control of the nameless hero. Move forward through the Exchange Zone, watching cutscenes, and pick up your first (broken) sword.

You can't win the fight with snappers, so lose and watch more cutscenes. Once you wake up in Diego's camp, you will unlock:

Diego will give you a quest - find A Decent Sword.
From his camp you can go right, down the stone stairs, to reach Beliar Temple, or left to reach Exchange Zone.
Go down the left path. On the right side look out for a ladder leading to a chest (yellow arrow), which contains an Amulet of Enlightenment (+25 total vitality).


Go back on the main path (green arrow). You'll reach a ladder that will help you unlock A Wrong Step achievement (red arrow). To the left (yellow arrow) you can find a pack of wolves, guarding a wine bottle (Sidequest: A Well Deserved Break), and the note you need to give to Diego for the achievement Whistleblower.


You can ignore the wolves and come back later, when you feel more capable. For now, go down the Exchange Zone (green arrow) to find Cayden. He will offer you a Burned Longsword (10 Attack damage), a solution to the main quest, as a reward for his Sidequest: The Stolen Pendant.
Leave the Exchange Zone down the new path. You should see a stone staircase (green arrow) and a bridge (yellow arrow).


Go up the staircase to find Sarus and Berig. Once you defeat Sarus, SPARE HIS LIFE. He will give you His Dice Box and initiate a Sidequest: Medicines for Sarus.
Ignore Sarus and Cayden for now. Loot Berig's body (1/3) to find a Logbook and a Key.
On the bridge next to Sarus is another dead body that you can loot (2/3).


Go straight ahead (yellow arrow) to reach Beliar Temple. Right in front of you, next to a tree is another corpse (3/3).


Loot it to unlock the achievement:


From there you can go right up the stairs to reach Diego's Camp, straight ahead to reach Orry, who's guarding a gate and offers a sidequest, or left to reach Sarus and Berig's hidden stash. Go left first.


You can either walk off the stairs or go around them. Either way you'll find the stash there. Open it with Berig's key to find Cayden's Pendant and Secret Stash Note.
Backtrack to the bridge, and go back to Cayden. SAVE YOUR GAME.
Tell Cayden you didn't find the Pendant. Now cross the bridge again and immediately turn right.
Go through the hidden passage in the screenshot:


Open the locked door with Cayden's Pendant to unlock an achievement:


Cayden won't be happy that you lied to him and will attack you. RELOAD YOUR SAVE.

Open the secret stash before talking to Cayden again.

Inside you'll find a Longsword (20 attack damage) - the best weapon in the teaser, as well as a chest containing Hunter's Ring (+25 total stamina). Looting the ring unlocks another achievement:


NOW you can go back to Cayden. Give him BOTH Cayden's Pendant and Sarus's Dice Set to earn his trust, as well as the (crappy) burned sword.


Equip the best sword you have and go back to the wolves you passed earlier. Get the wine and the note. Go back to Diego to finish the quest now, or go talk to Orry at the gate first. This guide assumes that you ignored Diego just for a little while longer.

Orry offers a Sidequest: Orry's Headache. To the right of him is a ladder. Climb it and turn around. You should see a cliff that you can climb.


On top of it you can find a Seraphis (to the left) and a recipe for a Scavenger Sandwich (to the right).

Give the Seraphis to Orry. Sidequest completed. He still won't let you through, though.


Finally go back to Diego and show him your new sword.


And give him the note you found near the wolves.

Now go with Diego and Orry will let you through.

Speak with Orry again to receive another Sidequest: A Well Deserved Break. Give him the wine you found earlier to instantly complete it.


Now you can continue down the valley with Diego (black arrow).


You'll reach Bloodwyn, who will give you another Quest: Some Meat as a Debt. You need a Wolf Tusk and a piece of Snapper Meat. You should already have a tusk.

Go back to the location in the last screenshot. Go across the bridge (yellow arrow) to find 2 scavengers, a Rusty Longsword (15 Attack damage), and a 2nd Seraphis.

Go back to Sarus, who should be sitting next to the bridge with the first lootable body. Give him the Seraphis (or 10 blueberries, but you should save them for healing yourself) to heal him and complete his sidequest. Giving him 1 blueberry is a waste, as he won't get healed that way.



Go back and this time follow the red arrow - climb up the rocks to reach an area with wolves, scavengers, and a snapper.

SAVE YOUR GAME in case you mess up ahead.

Lure a wolf to the snapper, either through hit-and-run tactics, or baiting them with meat. The snapper will claim its kill, earning you an achievement:


Kill the snapper to get its meat.


Also worth noting is that in this area there is a hidden chest with a recipe, as well as a bowl that you can urinate in (refer to the miscellaneous tasks section).
Take the lift (aka elevator) near the cliff to quickly ride down to Diego and Bloodwyn.
Give Bloodwyn the Wolf Tusk and the Snapper Meat.


Diego will instantly give you a new Quest: The Fire Signal and a Key to the tower.
Use the lift again and open the locked gate. Climb the broken tower and turn off the signal.
Speaking to Diego now ends the game. If you still have other achievements to get, now is the time for that. Once you're ready, speak to Diego and choose to finish his quest.



Congratulations! You have completed Gothic Playable Teaser!

The 4 achievements that got removed from the game: