Portal (game)

"The Vital Apparatus Vent will deliver a Weighted Companion Cube in 3, 2, 1..."

"[If player traps themselves in the pellet catcher area] Despite the best efforts of the Enrichment Center staff to ensure the safe performance of all authorized activities, you have managed to ensnare yourself permanently inside this room. A complimentary escape hatch will open in 3... 2... 1."

"The device has been modified so that it can now manufacture two linked portals at once. As part of an optional test protocol, we are pleased to present an amusing fact: The device is now more valuable than the organs and combined incomes of everyone in [subject hometown here]."

"Spectacular. You appear to understand how a portal affects forward momentum, or to be more precise, how it does not."

"Hello again. To reiterate [slows down] our previous [speeds up] warning: This test [garbles] ...ward momentum."

"The Enrichment Center is committed to the well-being of all participants. Cake, and grief counseling, will be available at the conclusion of the test. Thank you for helping us help you help us all."

"Well done, android. The Enrichment Center once again reminds you that android hell is a real place where you will be sent at the first sign of defiance."

"Please note that we have added a consequence for failure. Any contact with the chamber floor will result in an "unsatisfactory" mark on your official testing record, followed by death. Good luck!"

"Due to mandatory scheduled maintenance, the appropriate chamber for this testing sequence is currently unavailable. It has been replaced with a live-fire course designed for military androids. The Enrichment Center apologizes for the inconvenience and wishes you the best of luck."

"[once Pellet has been caught] Very very good. A complimentary victory lift has been activated in the main chamber."

"This Weighted Companion Cube will accompany you through (most of) the test chamber. Please take care of it."

"Momentum, a function of mass and velocity, is conserved between portals. In laymans terms: speedy thing goes in, speedy thing comes out."