Action/Adventure
How to use climbing axes for fun and profit, with your hosts Nathan Drake and Lara Croft.

Fighting Games
In the red corner, Ken and Ryu. In the blue corner, Scorpion and Sub-Zero.

Massively Multiplayer Online (MMO)
Post here while you're in the queue - these games definitely do not have a single-player mode.

MOBA
If you understand the difference between a top-laner and a jungler, this might be the place for you.

Open World/Sandbox
Lets go build something

Racing Games
Put the pedal to the metal and come in here to discuss your virtual ride.

Role Playing Games
Step into someone else's shoes for a while, and live out their experiences all from the comfort of your chair.

Shooters
The question: First or third person?
The answer: *boom* Headshot!

Simulators
A place for all the city-builders, world-creators, transport managers, block-arrangers and intergalactic explorers.

Sports
You could step outside and take part in some sort of team activity... or you could hit Start instead.

Strategy
This might not be chess, but choose your next move carefully.

Tabletop and Board Games
Grab pen and paper, a dice bag and a bunch of tokens, and settle in here to chat about your real-world gaming activities.

Other Gaming / Gaming Hardware
...you guessed it. Any posts that don't fit in the other categories - or any discussions about gaming hardware (including Steam Machines!) - should go in here.