Amnesia: A Machine for Pigs features a set of achievements that encourage players to explore thoroughly and engage with the narrative. Unlike some games, there are no multiple endings based on player choices; the game has a single, predetermined ending that unfolds as Mandus confronts the Machine and his own past. The narrative is linear, leading to a singular, impactful conclusion.

Achievements:
Most achievements in A Machine for Pigs are tied to story progression and collecting all narrative elements. Here are some common types:
- Story Progression Achievements: These unlock automatically as you complete major chapters or reach significant plot points (e.g., 'The Awakening', 'The Boiler Room', 'The Machine's Heart').
- Collector Achievements: These require you to find all notes, documents, and listen to all phonograph recordings. To earn these, you must be diligent in your exploration and interaction with every piece of lore. (e.g., 'The Collector', 'The Archivist'). Refer to the 'Side Quests & Activities' section for tips on finding these.
- Specific Action Achievements: A few achievements might be tied to performing a specific, often subtle, action or interacting with a particular environmental detail. These are usually less about skill and more about thoroughness. (e.g., 'The Pig Whisperer' for interacting with a specific object).
To unlock all achievements, a single, thorough playthrough focused on exploration and lore collection is usually sufficient. There are no difficulty-based achievements, as the game's challenge comes from its atmosphere and narrative, not combat.
Endings:
A Machine for Pigs has one definitive ending. The story of Oswald Mandus and the Machine reaches a singular, tragic, and philosophically charged conclusion. Your actions throughout the game lead to this predetermined outcome, which is designed to be the culmination of the narrative themes and Mandus's character arc. The impact of the ending comes from your understanding of the events and Mandus's motivations, which is why collecting all lore is so important. There are no branching paths or choices that alter the final cutscene or narrative resolution.