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Valve is famous for crafting games that are polished and intuitive. But that's no accident: the developer has a near-religious obsession with playtesting. Learn more, in this video.

=== Before you watch ===

Content warning: Blood, Combat

=== Sources ===

[1] Valve reflects on The Orange Box, ten years later | PC Gamer
https://www.pcgamer.com/valve-reflect...

[2] Developer Commentary | Portal
https://store.steampowered.com/app/40...

[3] Portal Beta 2005 & More 2006 Content | Logan on YouTube
   • Portal Beta 2005 & More 2006 Content  

[4] Beyond the Box | 1UP
Archive: https://web.archive.org/web/201105240...

[5] Kim Swift - 'Our Journey From Narbacular Drop To Portal' | IGS 2007
   • IGS 2007: Kim Swift - 'Our Journey Fr...  

[6] Narbacular Drop | Digipen Institute of Technology
https://www.digipen.edu/showcase/stud...

[7] Valve's Design Process for Creating Half-Life 2 | GDC 2006
https://www.gdcvault.com/play/1013237...

YouTube mirror:    • Valve's Design Process for Creating H...  

[8] Valve’s philosophy with User Research... | Steve Bromley
https://www.stevebromley.com/blog/201...

[9] The Science of Playtesting | GameSpot
https://www.gamespot.com/articles/the...

[10] Opening the Valve | Eurogamer
https://www.eurogamer.net/i-valve-060606

[11] Valve Is Finally Ready to Talk About Its Games Again... | The Escapist
https://www.escapistmagazine.com/valv...

[12] Thinking With Portals | Game Developer Magazine
[PDF] https://ubm-twvideo01.s3.amazonaws.co...

[13] 126 - Josh Weier Interview | Kiwi Talkz
https://www.listennotes.com/podcasts/...

[14] The Cabal: Valve's Design Process For Creating Half-Life | Game Developer Magazine
Mirror: https://www.hl-inside.ru/magazines/gd...

[15] Handbook For New Employees | Valve
[PDF] https://cdn.akamai.steamstatic.com/ap...

[16] The 100 greatest video games of all time... | GQ
https://www.gq-magazine.co.uk/article...

[17] The Final Hours Of Half-Life 2 | Gamespot
https://www.gamespot.com/articles/the...

[18] Why Are Valve's Games So Polished? | IGN
https://www.ign.com/articles/2009/03/...

[19] Half-Life 2: Episode One Update Released | Steam
https://store.steampowered.com/oldnew...

[20] How fidgeting playtesters convinced Valve... | PC Gamer
https://www.pcgamer.com/how-fidgeting...

[21] Christine Phelan - Creating a Nightmare... | Konsoll 2021
   • Konsoll 2021: Christine Phelan - Crea...  

[22] Integrating Narrative into Game Design... | GDC 2008
   • Integrating Narrative into Game Desig...  

[23] RPS Interview: Portal's Kim Swift... | Rock Paper Shotgun
https://www.rockpapershotgun.com/rps-...

[24] Meet the minds behind Half-Life 2 | PC Gamer
https://www.pcgamer.com/meet-the-mind...

[25] The Final Hours of Portal 2 | Steam
https://store.steampowered.com/app/10...

=== Chapters ===

00:00 - Intro
01:25 - Playtesting Portal
05:47 - Valve's History
08:38 - Playtesting Tips
15:43 - Conclusion

=== Games Shown ===

Portal (2017)
Super Mario Odyssey (2017)
Far Cry 3 (2012)
Ratchet & Clank: Rift Apart (2021)
Portal 2 (2011)
Star Wars Jedi: Survivor (2023)
Narbacular Drop (2005)
Half-Life 2 (2004)
skate. (Unreleased)
Left 4 Dead (2008)
Half-Life 2: Episode One (2006)
Half-Life Alyx (2020)
God of War Ragnarök (2022)
Untitled Magnet Game (Unreleased)
Superliminal (2019)
Viewfinder (2023)

=== Credits ===

Music provided by Epidemic Sound - https://www.epidemicsound.com/referra... (Referral Link)

Narbacular Drop - Full Walkthrough | COG in the Game
   • Narbacular Drop - Full Walkthroiugh -...  

Konsoll 2021: Christine Phelan - Creating a Nightmare in Half-Life: Alyx | Konsoll
   • Konsoll 2021: Christine Phelan - Crea...  

F-Stop (After-Image) - "lab_intro_scripted2" | fstop
   • F-Stop (After-Image) - "lab_intro_scr...  

Portal 2: F-STOP PROJECT CAPTURE - Full Walkthrough | Bolloxed
   • Portal 2: F-STOP PROJECT CAPTURE - Fu...  

Exposure by LunchHouse Software | LunchHouse Software
   • Video  

Mirror: https://www.playground.ru/portal/news...

=== Subtitles ===

Contribute translated subtitles - https://amara.org/videos/MyGYKu72hcPs/