Portal: Timestall is a free Portal 2 mod that follows the story of a test subject that is a part of Apertures lost time travel experiments. After something goes wrong you are lost in time and must advance through a new era of Aperture Science to stop time from collapsing. Timestall features a campaign that rivals Portal 2s in length, providing a fully voice acted story and brand new time based mechanics. Solve all new puzzles with the help of time slowing and time pausing while trying to figure out how to get back home and stop time from collapsing in on itself.
The lab boys told me that the electricity bill for the Under Construction tests was a little too high. I told them to just turn all the un-necessary lights into power saving mode and to my surprise we actually had a power saving mode on our lights, so they did. Even the indicator lights! Now the lights emit an ominous red. Just the way I like my reds.