Portal 2 Save File 100% – Story + Co-op Complete + All Achievements

Verified & Safe PC (Steam) Updated September 2026 Co-op Included

100% complete save file for Portal 2 PC. The single-player story is finished through the credits, the two-player co-op campaign is completed, and every Steam achievement obtainable through normal play is unlocked, with chapter select available for any test chamber.

Save File Details

Game	Portal 2
Developer	Valve
Platform	PC (Steam)
Version	Latest Steam build
Completion	100% — Single-Player Story + Co-op Campaign + All Achievements
Steam App ID	620
Save Path	[Steam library]\steamapps\common\Portal 2\portal2\SAVE\{SteamID64}\
Save File	Multiple .sav files (autosave.sav, quick.sav, manual saves)
File Size	~5 MB (ZIP)
Last Updated	September 2026

What's Included

Single-player campaign completed through the credits

Two-player co-op campaign fully completed

All Steam achievements unlocked

Chapter select unlocked for every test chamber

All co-op campaign chambers flagged complete

Developer commentary nodes available

Compatible with the current Steam build

portal-2-100-save.zip ~5 MB (ZIP) autosave.sav included Virus-free verified

How to Install

Important: Portal 2 saves live inside a per-account subfolder named after your SteamID64, not a generic path -- make sure you copy the included save files into the folder matching your own account, or the game won't recognize them as valid saves.

Close Steam and Portal 2 completely.

Navigate to [Steam library]\steamapps\common\Portal 2\portal2\SAVE\ and open the subfolder matching your SteamID64 (there's usually only one).

Backup your existing .sav files by copying them to your desktop.

Download and extract the .zip file, then copy the save files into that SteamID64 folder, replacing any existing ones.

Launch Portal 2 through Steam.

From the main menu, select Resume Game or use chapter select to jump to any completed chamber.

Your story and co-op progress load in fully completed, with every achievement already registered.

About chapter select: Portal 2 unlocks chapter select for both the single-player and co-op campaigns once you've completed them at least once, letting you replay any individual test chamber without resetting overall progress. This save has every chapter already completed, so the full chapter select menu is available immediately.

Frequently Asked Questions

Is this Portal 2 save file safe to use?

Yes. It's a plain local save file with no server-side account data attached, so it only affects your own local game files.

Where is the Portal 2 save file located on PC?

At [Steam library]\steamapps\common\Portal 2\portal2\SAVE\{SteamID64}\, in files such as autosave.sav and quick.sav. Steam App ID 620.

Does this include the co-op campaign?

Yes, the two-player co-op campaign is flagged as fully completed alongside the single-player story.

Do I need a co-op partner for the co-op content to show as complete?

No — since this is a local save file, the co-op campaign's completion flags are already set. You won't need to actually replay it with a partner unless you want to.

Will loading this save spoil the story?

It gives you access to the ending and every later test chamber via chapter select, so if you haven't played Portal 2 before, consider a fresh playthrough first.

Does this include DLC or Perpetual Testing Initiative levels?

This save covers the base game's single-player and co-op campaigns. Community-made Workshop test chambers are tracked separately and aren't affected by this save.

Does this work on Steam Deck?

Yes, the save format is identical, though the folder path under Proton sits inside the compatdata prefix rather than a plain Windows user folder.

About Portal 2

Portal 2 is a first-person puzzle-platform game developed and published by Valve, released in April 2011 as the sequel to 2007's Portal. Players return to the Aperture Science facility as Chell, solving increasingly elaborate portal-based physics puzzles while navigating a story now driven by both the malevolent AI GLaDOS and the well-meaning but bumbling personality core Wheatley.

The game roughly doubles the scope of the original with a lengthy single-player campaign spanning old and new areas of Aperture Science, plus an entirely separate two-player co-op campaign starring robots Atlas and P-body, built around puzzles specifically designed around cooperative portal placement and communication.

Portal 2 was met with near-universal critical acclaim on release, frequently cited as one of the best-designed puzzle games ever made, and its writing -- particularly Wheatley's and GLaDOS's dialogue -- remains widely quoted within gaming culture more than a decade after launch.

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