Game Detail
App ID 620 | Recorded April 3, 2026 at 01:16 AM
Action, Adventure
Categories: Single-player, Multiplayer, Co-op, Online Co-op, Shared/Split Screen Co-op, Shared/Split Screen, Steam Achievements, Full Controller Support, Steam Trading Cards, Captions available, Steam Workshop, Steam Workshop, Camera Comfort, Custom Volume Controls, Playable without Timed Input, Save Anytime, Stereo Sound, Surround Sound, Steam Cloud, Stats, Includes level editor, Commentary available, Remote Play on Phone, Remote Play on Tablet, Remote Play on TV, Remote Play Together, Family Sharing
Release date: April 18, 2011
Developer/Publisher: Valve / Valve
Overwhelmingly Positive 99% · 206,186 reviews
Official Steam summary
The "Perpetual Testing Initiative" has been expanded to allow you to design co-op puzzles for you and your friends!
Current price
$9.99
All-time low
$1.99
12-month low
$1.99
Verdict
Wait
+402% above the all-time low.
106 helpful
---{ Graphics }--- ☐ You forget what reality is ☑ Beautiful ☐ Good ☐ Decent ☐ Bad ☐ Don‘t look too long at it ☐ MS-DOS ---{ Gameplay }--- ☑ Very good...
36 helpful
[h1] 10/10 [/h1] Masterpiece of a puzzle game, puzles are very cleverly done and fair. Voice acting was really good. I would havee liked to hear jk si...