The base's real name was almost 'Area 51' — and the code still calls it that.
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The base's real name was almost 'Area 51' — and the code still calls it that.

Despite being called Area 69 in the final game, the internal texture files still use the prefix 'a51' (Area 51), and a cut mission titled 'The Truth is Out There' explicitly referred to the base as Area 51 before Rockstar changed it.

Source: Area 69 — CC BY-SA

The full story

Fan-made blueprint of Area 69 — the kind of detailed layout that still carries the ghost of its original Area 51 identity.
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Fan-made blueprint of Area 69 — the kind of detailed layout that still carries the ghost of its original Area 51 identity.

Area 69's spot on the San Andreas map — ground zero for the cut 'The Truth is Out There' mission that called it Area 51.
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Area 69's spot on the San Andreas map — ground zero for the cut 'The Truth is Out There' mission that called it Area 51.

Interior shot proving this place screams Area 51 energy, name change be damned.
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Interior shot proving this place screams Area 51 energy, name change be damned.

Another interior angle where those 'a51' texture prefixes are still hiding in the code, Rockstar's sloppy little secret.
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Another interior angle where those 'a51' texture prefixes are still hiding in the code, Rockstar's sloppy little secret.

The kind of shot that shows how hard they leaned into Area 51 lore before the lawyers probably showed up.
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The kind of shot that shows how hard they leaned into Area 51 lore before the lawyers probably showed up.

Freeway glitch near Area 69 — even the game's bugs can't keep track of what this place is actually called.
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Freeway glitch near Area 69 — even the game's bugs can't keep track of what this place is actually called.

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