Portal, if you haven't played it. That's literally the only game I have on Steam.

allow me to list some games

-Portal

-Portal 2

-Left 4 Dead 2

-Team Fortress 2

-RWBY Grimm Eclipse

-The Walking Dead Season One

-Tales from the Borderlands

-Monaco

-Undertale

-The Stanley Parable

Zoombinis. That's literally the only game I've played on Steam.

I have LEGO Worlds too, but it doesn't run on my Mac.

Play everything by Valve. Or at least the Portal games.

Terraria, but that can rapidly become a black hole into which you shall pour all of your spare time to appease Lord Redigit.

Guns of Icarus Online is good, but both your success and how much fun you have are determined by the teammates you get. This usually isn't a problem, but it's an absolute pain when you have an engineer that refuses to fix anything.

~Unit#phntk#1

Get Civ 5.

Watch your life drift away...

Undertale, definitely.

Excellent Games: Select Choices from Burn's Steam Library

-Amnesia: The Dark Descent

-Bastion

-The Binding of Isaac: Rebirth

-Borderlands 2

-Cave Story+

-Cthulhu Saves the World

-Dark Souls: Prepare to Die Edition

-Darksiders

-Dragon Age: Origins - Ultimate Edition

-Dust: An Elysian Tail

-The Elder Scrolls IV: Oblivion

-Fallout: New Vegas

-FTL: Faster Than Light

-Gunpoint

-Guns of Icarus Online

-LIMBO

-LUFTRAUSERS

-Mark of the Ninja

-Monaco

-Ori and the Blind Forest

-Outlast

-POSTAL 2

-Psychonauts

-Sid Meier's Civilization V

-Star Wars: Knights of the Old Republic

-The Talos Principle

-Team Fortress 2

-Transistor

-Valkyria Chronicles

-VVVVVV

-

A lot of these have been said but:

Bastion

Transistor

Mark of the Ninja

Metal Gear Rising: Revengance

Transformers: Devastation

The Bioshock games

The Half-Life Games

Portal and Portal 2

Borderlands 2

Shadow of Mordor (good game, awful port)

I'm sure there's more but those are some of my favorites.

crypt of the necrodancer is also pretty fun

also get undertale for sure. and portal 1 and 2.

All you will ever need is Roller Coaster Tycoon. I certainly didn't get Steam for JRPGs, nope.

Well, this has been a popular entry.

Thanks for the recommendations!  I can't promise I'll play even half of what you all have suggested.

Meanwhile I'm playing my way through The Bottom of the Well.  Lots of death.  Good times.

I can recommend Antichamber and The Talos Principle if puzzle games are your thing.

Better learn some Russian dude, because there is nothing but Russians that play Dota 2.

I can recommend Antichamber and The Talos Principle if puzzle games are your thing.

Puzzles you say?

I can recommend Antichamber and The Talos Principle if puzzle games are your thing.

 

Puzzles you say?

I SAID GIVE ME ANOTHER.