Last 7 days · history since Nov 5, 2026
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59% positive of 306 · Mixed · Live from Steam
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This is a mod for Portal 1. Includes new maps, storyline, a whole new Portal experience. After you play the game, every other mod will look simple, balanced and average. Lost in Aperture try to show, that the portal universe can be way bigger, and a lot more, then just solving puzzles.
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What changed on Steam for this game since we started following it: prices and sales, builds, name, release date and review score.
Review score: 58% on 2026-11-03 → 59% today (306 reviews)
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Every build released on Steam for this game since we started tracking it, with the developer's patch notes. Updated within minutes of each new build.
-Now all levels has a companion cube-Chapter 3 is now easier.
-Just a new bonus map what you can find in the Main Bonus maps folder, with the name "Maze"
-Peaceful Pigs got a ton of levels-Other improvements
New Routes: -Missing Items: You can reach it from chapter 5-Peceful Pigs: You can reach it from chapter 7New Bonus Maps:-Peaceful Pigs: A whole new story!Others:-The Airport, level selector got improved and a lot of other maps.-Bigger Soundtrack-Better UI-Ton …
-The warning sign, when the game is booting-Some visial changes, mostly in the poolrooms-Bug fixes
-Visual improvements in chapter 6-Bug fixes
-A new Peaceful Pigs Chapter-Better Peaceful PIgs UI-More bonus map (not just Peaceful Pigs)-Lot of bug fixes and smaller and bigger impriovements everywhere
In chapter 8 (map v6) you should look around! Maybe there is something new there!-Some visuall improvements-Bug fixes-Some other minor changes
-More bonus maps-Visual Improvements-Gui Improvements-Bug fixes
-2 new bonus map-Visual improvements at the intro map and in the endnings-Some more smaller improvements
-Impromevents in chapter 7, in chapter 1, in chapter 5, in greenhill
-More Peaceful Pigs levels. A whoole new theme with 4+ levels, and +1 tropical level
-Fixed the crash in the Castle map-No crosshair bugs got fixed-Peformance improvements in chapter 8 and the Castle map
-Gamepad UI got added-Tons of bug fixes-Some visual improvements too
-Bug fixes in a lot of maps
Guys, there is some bad news.I had to rewert the change with the file size, now the game size is double. The file size reduction caused so much smaller problems with textures, sounds and with things what I have not been able to find, so I had to do that. For m…
-Bloom got added to most of the light sources-Some other improvements what most likely you will never notice XD
Today I managed to cut the file size nearly in half. I managed to do this, because Im no longer updating the mod weekly, and doing this is a long and painfull process. Also it most likely caused many bugs, so IF YOU FIND ANY BUGS, PLEASE REPORT BACK TO ME! Als…
-Improvements in Chapter 2 and 3! Mostly visual improvements. More overlays, textures and some other stuff too.
-Visual Imrpovements in Chapter 8/ map "v6"-The portals have a new colours now, it's not blue and orange, it's more like aqua and gold. -Now you pick up the portal gun automatically in every level.