Half-Life
Left 4 Dead
Dota 2
Portal
General
100
Scientist from Black Mesa who owns a pet headcrab.
Who is Dr Kleiner?
100
A powerful zombie which will ignore players unless directly provoked.
What is the witch?
100
A structure located inside the base of each team, destroying this wins the game.
What is the Ancient?
100
These are the two colours of your portals.
What are blue and orange?
100
Multi-game package deal released by Valve in 2007, widely known as 'The Best Deal in Gaming'.
What is the Orange Box?
200
The alien dimension discovered by scientists at Black Mesa
What is Xen?
200
Survivor from Left 4 Dead, his cap is rewarded as an in game item to all TF2 players who also own Left 4 Dead.
Who is Ellis?
200
These are the three primary attributes, governing health, attack speed and mana respectively.
What are strength, agility and intelligence?
200
The protagonist of both Portal games
Who is Chell?
200
This was the first Valve game to require Steam in order to download and play.
What is Counter-Strike (1.6)?
300
This is the full name of the gravity gun.
What is the Zero Point Energy Field Manipulator?
300
This is the studio that co-developed the Left 4 Dead games alongside Valve.
What is Turtle Rock?
300
This is the number of towers on the map.
What is 22?
300
A free tech demo for the Steam deck, set in the Portal universe
What is Aperture Desk Job?
300
This is the UI system used in the Source 2 Engine
What is Panorama?
400
This is the chapter of Half Life 2 where the player first acquires the pistol.
What is Route Kanal?
400
This is the game mechanic responsible for controlling the infected and ensuring each playthrough feels unique.
What is the AI Director?
400
A free to play auto battler released in 2019, under the Dota brand.
What is Dota Underlords?
400
This is the ship mentioned in both Portal and Half-Life, connecting the two universes.
What is the Borealis?
400
This is the internal codename of Valve's upcoming project, Deadlock
What is Citadel?
500
Non-Player character encountered during the chapter 'Sandtraps' in Half-Life 2. Referred to as 'the finest mind of his generation'.
Who is Laszlo?
500
Part of the first person character model that was present in Left 4 Dead, but absent from Left 4 Dead 2
What are Legs?
500
The winners of the first ever Dota 2 tournament, The International(2011).
Who are Natus Vincere(Na'Vi)
500
Speedrun category where console commands are used to spawn a vehicle from Half Life 2, in order to progress without using the portal gun.
What is Airboat% ?
500
The location of the Valve headquarters.
What is Bellvue, Washington?