Portal: Lost in Aperture — Steam game overview

Stored observation / content update: 2026-10-25T20:46:16.000Z

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.

Game metrics below are stored observations; missing values are unknown.

Revenue is modelled, not confirmed sales. See the methodology and uncertainty range.