What are the best games on Steam that can run on a toaster?

Terraria is my go-to toaster game. I've also had surprising luck running Mount & Blade on all sorts of super low-end machines. With older games, generally if you can find one thing that works you should be able to run most of the stuff that came out around that same time.

Runs on toaster is good mc toaster here .
-> Terraria [often named before]
-> Binding of Isaac or Rebirth [I had alot of fun with both though and it will run 100% on a Toaster ]
->Dungeon defenders should run too .
-> Super meat boy [for salty rages]

Let me sum up about 80% of the thread:

Any 2D game.

You can also add most any 3D game made before 5 or 6 years of the original release date of your on-board graphics chip or integrated graphics.

To the Moon is amazing and doesn't take much to run

💟
http://store.steampowered.com/app/745870/Prehistorik/
http://store.steampowered.com/app/749140/Prehistorik_2/

The Caribbean Sail

An Oregon Trail on the sea, great developer who keeps adding stuff and interacts with his customers regularly, which includes - but is not limited to - implementing good suggestions. Highly recommended.

Eador. Genesis
Out There
Desktop Dungeons
Kingdom New Lands
FTL: Faster Than Light

Half-Life

If your onboard gfx already understands Shader Model 3, this game is nice, if on sale:
Rebel Galaxy -> http://store.steampowered.com/app/290300/Rebel_Galaxy/

Awesomenauts is f2p and runs decent on my toaster. I do have an i5 5200U and 8gb of ram though

corporate lifestyle simulator. I will always remember how much fun I had with it, when i was sadly cornered with a mini laptop with no graphic card: that game saved my week

Motorsport Manager in 2D mode, 40-45fps on Intel HD4400 (4th gen laptop i5).

Shadowrun games ran pretty good even on 1 core celeron.

The fact that FTL has been only listed three times is criminal. That would be my best recommendation. I also think the original Binding of Isaac should work if you're into really challenging games. Rebirth is a little bit more graphics intensive so be careful there, my old toaster didn't run rebirth well but ran the original fine.

Zork Anthology
FTL
Rogue Legacy
X-COM Ufo Defense
Resonance, TechnoBabylon (or most games published by Wadjet Eye for that matter), Kathy Rain

Both have already been listed (and deserve a +1), but Tales of Maj'Eyal and FTL will give you 100's of hours of solid gameplay.
I'd also add The Black Watchmen (ARG, if you're into those) and The Zafehouse Diaries. I had a pretty solid time with Displaced as well.

From a few years of horrible experience with a toaster/potato myself;

-Terraria
-Shellshock Live
-Mount & Blade: Warband
-Battleblock theater
-Warhammer 40,000: Dawn of War GOTY/Dark Crusade/Winter Assault
-Lego Batman: The Videogame
-Portal/Portal 2
-Dead Island (lowest settings)
-Fable: The Lost Chapters
-Garry's Mod
-Batman: Arkham Asylum GOTY (lowest settings)

(Assuming it is an APU with an integrated graphics card)

Here's some recommandations from me wich should be playable on almost any pc:

Super recommended:

To the Moon While being made with the rpg maker this is not an rpg but a storytelling adventure game. Despite it simple looks it's story and the kind how it tells it really touched me. Should definetely be played by more people. <3

The Last Door Point and Click Adventure in an lovecraftian setting with minimalistic - yet still nice and handmade - visuals but lovely soundtrack and deep atmosphere. Second one is equally good.

Stardew Valley Well not exactly an insider tip but has to be mentioned by me on here. Highly addictive

A bit less recommended but still nice:

Pony Island I saw it was mentioned by someone before but still wanted to do so. A great, clever, little game. =)

An Assassin in Orlandes Choose your own Adventure style game wich was surprisingly fun to me. Could be worth a look if you don't mind reading a lot. I myself really enjoyed it

Dark Fear A nice little indie horror rpg in the style of old Sierra adventures

Super Win the Game A 2d platformer wich could be right from the nes area. Challenging, charming and a lot of stuff to collect.

Knights of Pen and Paper A rpg where you play a pen and paper round. Gets a bit grindy but otherwise pretty fun and a nice pixelart style.

8-bit Adventures Another rpg. This one is like a big homage to the old final fantasy games and nes era. A good one.

Retro City Rampage GTA-Style retro pixelgame with dozens of references to the nes era and the 90's in general.

The Deed Mistery criminal game with the clou at the thing that you are not the detective but the murderer and you have to find a way to do the perfect murder and not get caught with it. Loved the concept.

How old is the toaster? (CPU & motherboard model).

duke nukem 3d / doom / wolfenstein

old games like prey (2006), quake, deus ex 1 work on your pc?
i don't know what kind of onboard/cpu graphics you have.

from what i have in my library:

dead in bermuda
duck tales
fallout 1-2-tactics
gemcraft
sunless sea
the banner saga

Kingdom new lands
Chroma squad
Massive chalice

I was going to say check some older games over on GOG.com . You can filter by system requirements as well as release years, so for instance you can pick release yrs 2004-2009 to get some ideas of things to check out some reviews for running on less powerful systems.

https://www.gog.com/games?sort=popularity&page=1

I see stuff like Civ 4, Sim City 4, Thief Deadly Shadows, Deus Ex, Tropico, Red Faction - but depending on what you like it'll be different

You have a lot of unplayed games https://steamdb.info/calculator

Atom Zombie Smasher
Bejeweled 3
Breath of Death VII
Dark Scavenger
Gunpoint
klocki
Knights of Pen and Paper +1
Morphblade
One Finger Death Punch
Steamworld Heist
Sid Meier's Pirates!
TIS-100
Thomas Was Alone
Undertale
VVVVVV
Classic X-COM games

What's your integrated graphic card? I played most of these games on intel hd 4000 and it runs fine. I think it should be fine for you.