Plot: Bridge Constructor Portal is an engineering simulation and puzzle video game developed by ClockStone and published by Headup Games. The game is part of the Bridge Constructor series, and incorporates elements of Valve's Portal series, taking place in Aperture Laboratories. Wikipedia
Plot: Constructor is a 1997 video game released originally for MS-DOS personal computers, and later ported to the PlayStation, macOS and Microsoft Windows-native DirectX 3. It was developed by System 3 and published by Acclaim Entertainment. Wikipedia