: You can bring future versions of cubes back to the present, effectively allowing you to use two cubes to solve a puzzle, though you cannot take a present cube into the future. Content and Story PORTAL RELOADED - Full Walkthrough
: If you place a blue or orange portal in the present, it automatically appears in the same spot in the future. However, placing a portal in the future does not move its counterpart in the present. Portal Reloaded
: What you do in the present directly affects the future, but actions in the future do not change the past. : You can bring future versions of cubes
The defining feature is the , which allows you to travel between two different timelines: the present and a version of the facility 20 years in the future. : What you do in the present directly