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11 PDA
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33 The PDA (Personal Digital Assistant) is the player's primary information device in every Subnautica game. It serves as an encyclopedia, inventory manager, crafting recipe guide, mission tracker, and survival assistant. In the original Subnautica, the PDA became iconic for its dry corporate humor and its running tally of the player's debt to Alterra Corporation. In Subnautica 2, the PDA also tracks genetic adaptations from the DNA Adaptation System.
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55 Functions
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77 The PDA is an all-in-one information system accessed through the player's in-game menu. Its primary functions include:
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99 FunctionDescriptionEncyclopediaStores data entries for every creature, plant, mineral, and technology scanned with the Scanner. Entries include biological data, habitat information, and assessment notes.Blueprint trackingRecords crafting blueprints unlocked through scanning. Shows required materials and scan completion progress for multi-fragment items.Data logsStores audio logs and text entries found at wreckage sites, lifepods, and Architect facilities. These logs piece together the game's story.Survival readoutsDisplays current health, food, water, and oxygen levels.Signal trackingShows active radio signals and beacon coordinates to guide exploration.InventoryTracks items carried in the player's personal inventory and storage containers.
1010 Voice and personality
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1212 In the original Subnautica, the PDA speaks with a calm, matter-of-fact female voice. It provides environmental assessments ("Detecting multiple leviathan-class lifeforms in the region. Are you certain whatever you're doing is worth it?"), survival tips, and corporate reminders. The PDA's tone is deliberately deadpan, creating dark humor through the contrast between its businesslike manner and the life-threatening situations the player faces.
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1414 Different systems use different voice profiles. Most vehicles and base systems use a female voice, while the Cyclops and Prawn Suit use a male voice. The PDA also tracks the player's estimated debt to Alterra, which reaches approximately one trillion credits by the time the player escapes Planet 4546B.
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1616 Alterra debt system
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1818 The PDA logs every resource the player picks up as Alterra Corporation property. Any materials harvested while an employee is "on the clock" (including during survival situations) are legally the company's. Picking up a Diamond triggers a notification about its three-million-credit value. By the end of the game, Ryley Robinson's accumulated debt reaches approximately one trillion credits. Alterra refuses to let him land on any company facility until the debt is settled.
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2020 In Below Zero
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2222 In Below Zero, the PDA retains its core functions but operates in the context of Robin Ayou's personal mission rather than a corporate survival scenario. The PDA also integrates with Al-An's presence in Robin's mind, displaying data about Architect technology and the consciousness-sharing system.
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2424 In Subnautica 2
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2626 The PDA in Subnautica 2 gains a new function: tracking genetic adaptations from the DNA Adaptation System. A section in the PDA displays the player's current genetic modifications, showing which adaptations are active and how the player's biology has changed through interaction with Planet Zezura's fauna via the Biosampler.
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2828 The PDA works alongside the Ship AI, which serves as the primary narrative guide in Subnautica 2. While the Ship AI delivers mission objectives and story dialogue, the PDA provides the encyclopedic data layer: creature entries, blueprint tracking, and environmental readings.