Great Games for Low-End Rigs?

FTL, To The Moon, Papers Please, Gemini Rue...

Post your computer specifications.

Papers, please is amazing. Also Gunpoint.

Recettear, Serious sam classic

what effort said
Triple Town, Reccetear, Cave Story + (or just original non-updated graphics/music "Cave Story)
Caster

Define "low end." To some people that might mean an i3 and GTX 560, which can still run pretty much anything if you turn the settings down enough, or it might mean a Celeron and a Ragepro128. Hell if you've got a 386 I could still give you some suggestions.

Also, what kind of games do you like? There are a billion lo-fi indie games these days that will run on basically anything, not to mention all the classics.

emulators :) ( gba , snes, genesis)
I play super mario world and wario land II on my pc :D

Nitronic Rush
Streets of Rage Remake V5
Warning Forever

And with this, I have hit 10,000 posts on this site.

A lot of indie games. Personally, I have many hours racked on Counter Strike Source which runs beautifully on Low settings but full resolution

edit: nvm looks like you already have CSS. But I can recommend Simcity 4, Civ 4, or Spelunky.

mine is not the best but i can run things like Path of Exile, S4League, Rusty Hearts, and even Dark Souls (a little slowly, but it's playable) oh and of course, i loved to play Lost Planet and Lost Planet 2.

If your PC can't handle those games, try something less expensive to your system, like 'Long Live the Queen' (i found that kind of cool, but i wish it had a narrator all the time), you could also try to get some old games for consoles, people don't make games like Digimon World 1 for PSX anymore

Battlefield 4 and/or Crysis 3

Here are a few:
Torchlight, Torchlight II, Papers Please, Guncraft, Castle Crashers, Bastion, Counter-Strike 1.6+CZ, Inside a Star-filled Sky, Red Orchestra Ostfront 41-45, Sniper Elite 1, Terraria, Star Wars: Dark Forces, Star Wars Jedi Knight: Dark Forces II, Star Wars Jedi Knight: Mysteries of the Sith, Star Wars - Jedi Knight II: Jedi Outcast, Star Wars Jedi Knight: Jedi Academy, Star Wars: KotOR, Star Wars: KotOR II, Star Wars: Starfighter, The Tiny Bang Story, Machinarium, A.R.E.S. Extinction Agenda, Hacker Evolution.

Please get Terraria. You will not be sorry.

Risk of Rain is pretty fun. Though pretty hard.

Minesweeper
Solitaire

Total Annihilation

games from spiderweb software and zeboyd games will get you a lot of hours of gameplay for the turn based party rpg genre

fortix 1 and 2, binding of isaac

Fez, mark of the Ninja, indie games

Transformice

Portal (1 and 2), Killing Floor, Torchlight (I and II)

Battle for Wesnoth, Spelunky, Cave Story, Treasure Adventure Game.

I have an old low-end laptop and all of these run fine on it.

FTL: Faster Than Light,

To The Moon,

Castle Crashers,

Torchlight II,

Star Wars: Knights of the Old Republic,

Star Wars: Knights of the Old Republic II,

Star Wars Republic Commando.

edit: would also like to mention Endless Space, (ran surprisingly well, and is a beautiful game)