Portal is a first-person puzzle game. Players must solve physical challenges by opening portals to maneuver objects, and themselves, through the enigmatic Aperture Science Laboratories.

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Epsilon

Epsilon

Puzzle

Epsilon is a mod with custom visuals (new textures, sounds) that tells a story of an alternative Aperture Testing Facility during the events of the original...

Portal: Prelude (FIXED)

Portal: Prelude (FIXED)

Puzzle

Prelude prelude seems to have this habit of crashing with a white screen at the start WELL FEAR NO MORE ITS FIXED AND NOW READY 2 GO! Original Mod - www.moddb.com/mods/portal-prelude...

Portal: Multiplayer Testing Initiative

Portal: Multiplayer Testing Initiative

Puzzle

Welcome to the Portal: Multiplayer testing initiative. Play through the first version of Portal but with a friend. Unlike other Portal Multiplayer Mods...

Portal: Project Beta Revived

Portal: Project Beta Revived

Futuristic Sim

Have you ever wanted to roam around in the Half-Life style 2005 Beta of Portal, or maybe fight the Beta GLaDOS in the 2006 Beta? Well, look no further...

The Lost Test

The Lost Test

Puzzle

Only a single test with the save file. To install, put the .bsp in your Portal Maps folder, and put the .sav and .tga files in your Portal Saves folder.

Portal-Life 2

Portal-Life 2

First Person Shooter

The original Half-Life 2: Portal Mod, with HL2 maps, Gordon Freeman Playermodel, and more extra content! Have fun! -iCrazyBlaze

Humans After All

Humans After All

First Person Shooter

Humans After All is a package that delivers a growing collection of maps for Portal.

iCrazyBlaze's Really Stupid Portal Modpack

iCrazyBlaze's Really Stupid Portal Modpack

Puzzle

Just a bundle of mods that I found on teh interwebz. Links to the original mods can be found in "README_Mods.txt". Have fun!

Portal: Enhanced

Portal: Enhanced

Puzzle

Portal: Enhanced will enhance the gameplay of your ordinary Portal by adding textures, models, and more.

Portal Reversed Map Order

Portal Reversed Map Order

Puzzle

Inspired by original maps, a full experience is brought to all of the demanding Portal speedrunners. Complete the mod as quickly as you can and compete...

Portal Prospekt

Portal Prospekt

Puzzle

Portal Beta recreation in the Nova Prospekt aesthetic of the early/mid 2005 beta.

Portal: Ratman Stories

Portal: Ratman Stories

Puzzle

Portal: Ratman Stories is a fan-made mod for Portal, featuring Aperture Science employee Doug Rattmann (known from the Portal 2 Comic) as protagonist...

Blapperture Mesa

Blapperture Mesa

Puzzle

In this particular Earth in the multiverse, Black Mesa has been bought by Aperture Science and has been renamed to Blapperture Mesa. The experiment involving...

Portal-Leipzig

Portal-Leipzig

First Person Shooter

A Portal Recreation of the Leipzig Era (Early 2006) Aesthetic in the early 2006 leaked beta. (Doesn't yet) Include: Recreation of all 19 Test-Chambers...

Ruins of Aperture

Ruins of Aperture

Educational

ROA Tempts to do something no one else has done, Portal 2's ruined and overgrown style inside of Portal 1. ( Don't expect this to be quality, This is...

Portal Twitch Interaction

Portal Twitch Interaction

First Person Shooter

PortalTwitchInteraction is a mod that allow your twitch viewer to choose what command will be execute during your run

Portal 2005

Portal 2005

Puzzle

A Complete Mod That Uses Leaked Beta Maps To Try And Recreate The Portal 2005 Beta

Portal Multiplayer

Portal Multiplayer

First Person Shooter

Portal Multiplayer is a multiplayer Portal mod (Wow, who'd guess!) based around DM, TDM and CTF modes with the portal gun

Portal: Still Alive For PC

Portal: Still Alive For PC

Puzzle

The 14 advanced chambers from the XBLA version of Portal, now playable on your PC!

Portal: Canonical Base of ℝxℝxℝ

Portal: Canonical Base of ℝxℝxℝ

First Person Shooter

Inspired by original maps, a full experience is brought to all of the demanding Portal speedrunners. Complete as quickly as possible this game using many...

Portal: Fly High

Portal: Fly High

Puzzle

So this mod is about lots of tests that use the fling mechanic in the game and Involves Lots of skybox and nature stuff too so keep an eye out for this...

Portal: Project Beta

Portal: Project Beta

Puzzle

A Portal 1 beta mod using 2006 Valve beta assets and maps.

Portal: Unity

Portal: Unity

Puzzle

Portal: Unity is a mod for the Valve game "portal" with almost everything revamped. New story levels, New textures, redesigned portals, new protagonist...

Portal 2005 Corruptions

Portal 2005 Corruptions

Puzzle

just messing with scripts, materials, models and all that stuff credits to portal prospekt for the base, that i messed up

Cloned Cube

Cloned Cube

Cinematic

Cloned Cube is a Portal mod. It takes place after GLaDOS' fall in Portal. You assume the role of Chell's secret clone. You have to escape or else you...

Portal: Stay Alive

Portal: Stay Alive

Puzzle

Portal Stay Alive is a Portal 1 mod set in the same universe as Portal 2: Isolation and follows the same time line and features the all new puzzle design...

Portaltale Source

Portaltale Source

First Person Shooter

Frisk wakes up in Aperture. She tests with GLaDOS. Later in the test she meets Flowey in the testing track. They then work together to get out of Aperture...

Portal Beta 2005 Mod

Portal Beta 2005 Mod

Futuristic Sim

now in a mod a few days later. Ever wanted the old portal beta frome july 2005? well i do!! now you can with this pre made portal addon

Portal Fix Russian Localization

Portal Fix Russian Localization

First Person Shooter

INSTALLATION INSTRUCTIONS: 1. Unpack the archive in any way 2. Place unpacked folders along the path ... \ Steam \ steamapps \ common \ Portal \ portal...

Hetzchase Nailway

Hetzchase Nailway

Rhythm

Hetzchase Nailway is a random puzzle adventure through Aperture Science laboratories.