Where is Ahti during CONTROL Resonant?

The epilogue postcard places him on vacation near Cauldron Lake / Bright Falls. He is not staffing the Oldest House like in the first game.

Is Ahti in CONTROL Resonant? Rebuild & Postcard

Q: Is Ahti in CONTROL Resonant?

Yes. He appears in the Rebuild 8-bit memory sequence and leaves a Season’s Greetings postcard in Dylan’s apartment after the ending — he is not a roaming Manhattan NPC.

Quick answer: Yes — Ahti is in CONTROL Resonant, but he is not roaming Manhattan or the Oldest House like in CONTROL. He appears in the Rebuild main mission’s 8-bit / retro memory sequence (Ordinary / Prime Candidate Program), and after the campaign you can find his “Season’s Greetings” postcard in Dylan’s apartment (epilogue), pointing to a vacation near Cauldron Lake / Bright Falls. Pre-launch comments that he “wasn’t in the game” were incomplete. Unofficial companion — mild spoilers below.

Where you meet him

Rebuild (late Contain the Crisis) — pixel-art memory sequence; Ahti addresses Dylan (lines like offering “the job” and “what you leave behind…”).
You cannot casually find the janitor as an open-world NPC.
Community reads often treat the scene as Ahti speaking to present Dylan through the memory; Remedy leaves it ambiguous.

Epilogue postcard

After finishing the story, explore Dylan’s apartment and inspect the Season’s Greetings postcard from Ahti. Location text ties him to vacation around Cauldron Lake, Washington (Alan Wake territory) — matching earlier “probably in Cauldron Lake” jokes from Remedy staff.

Related: Cast · Missions · World / RCU · Play Control first?