"Portal Remastered" is a recreation of Valve's game from 2007, made with Unreal Engine 4. The main goal of the game is to recreate the first Portal game, without all graphical inconsistencies created by all differences between the first game and its sequel (like elevators between levels, GLaDOS appearance...).
This is a screenshot of the first level of the game, on the 26th of May 2017.
This picture is used for the main menu's background and for the loading screen's background of the level.