The game starts with the words "Good morning subject number 15837. It is time to begin your test." after which the first task starts with the use of Portal Gun. Text on top of the game suggests that subject might not be familiar with the facility, but explains that you need to exit the rooms.
First encounter with a dangerous mechanic happens with a modified Crusher (used only in the trailer for Portal) in task 11.
Items and Mechanics
The game uses most of the same mechanics that are used in Portal, but it also uses some scrapped and totally new mechanics aswell. One of the mechanics wasn't used in Portal but did make it to Portal 2.
- Shoot portals AWD - Move Q - Launch a blue portal E - Launch a yellow portal R - Close both portals F - Pick up an object ~ - Open up console (can be enabled through the options) O - Quick quality adjust Esc or P - Pause game
Tasks
Screenshots of the tasks
Screenshot of task #01, "Meet the ASHPD."
Screenshot of task #01, "Meet the ASHPD."
Screenshot of task #02
Screenshot of task #02
Screenshot of task #03
Screenshot of task #03
Screenshot of task #04, "Portal-Proof walls."
Screenshot of task #04, "Portal-Proof walls."
Screenshot of task #05
Screenshot of task #05
Screenshot of task #06, "ASHPD+Momentum."
Screenshot of task #06, "ASHPD+Momentum."
Screenshot of task #07
Screenshot of task #07
Screenshot of task #08
Screenshot of task #08
Screenshot of task #09
Screenshot of task #09
Screenshot of task #10, "You are not invincible."
Screenshot of task #10, "You are not invincible."
Screenshot of task #11
Screenshot of task #11
Screenshot of task #12
Screenshot of task #12
Screenshot of task #13
Screenshot of task #13
Screenshot of task #14
Screenshot of task #14
Screenshot of task #15
Screenshot of task #15
Screenshot of task #16, "Anti-Object."
Screenshot of task #16, "Anti-Object."
Screenshot of task #17
Screenshot of task #17
Screenshot of task #18
Screenshot of task #18
Screenshot of task #19, "Red Buttons."
Screenshot of task #19, "Red Buttons."
Screenshot of task #20
Screenshot of task #20
Screenshot of task #21, "Energy Balls."
Screenshot of task #21, "Energy Balls."
Screenshot of task #22
Screenshot of task #22
Screenshot of task #23
Screenshot of task #23
Screenshot of task #24
Screenshot of task #24
Screenshot of task #25, "Cubes."
Screenshot of task #25, "Cubes."
Screenshot of task #26
Screenshot of task #26
Screenshot of task #27
Screenshot of task #27
Screenshot of task #28
Screenshot of task #28
Screenshot of task #29, "They can shoot you."
Screenshot of task #29, "They can shoot you."
Screenshot of task #30
Screenshot of task #30
Screenshot of task #31
Screenshot of task #31
Screenshot of task #32
Screenshot of task #32
Screenshot of task #33, "Think with portals."
Screenshot of task #33, "Think with portals."
Screenshot of task #34
Screenshot of task #34
Screenshot of task #35
Screenshot of task #35
Screenshot of task #36
Screenshot of task #36
Screenshot of task #37
Screenshot of task #37
Screenshot of task #38
Screenshot of task #38
Screenshot of task 339
Screenshot of task 339
Screenshot of task #40
Screenshot of task #40
Trivia
In task 16 as you are passing the first Blue plasma wall, a character carrying a briefcase (presumably the G-man from Half-life-series) can be seen walking behind the window.