What can I play with this super low end laptop?

Heroes 3 ! :D

Really Big Sky
Escape Goat
QuestRun
Dead Bits
Woodle Tree Adventures
Victim of Xen
Bad Rats
Radical Roach
Card CIty Nights
Botanicula
Doc Clock
Numba
Proteus

to add on to the other lists

all of these worked with my netbook which ran XP

Morrowind? ( I'm bad with specs, but it ran well on my archaic laptop as well)
Old isometric RPGs: Arcanum, Fallout 1-2-tactics, Planescape Torment, Baldur's Gate, neverwinter Nights, Temple of Elemental Evil etc
Warcraft 3? Half Life 1, Red Faction
or Anything from this picture There is nothing to be ashemed of playing old games as long as they are good. And there are some kick-ass wonders on this list.

Age of Empires I or II should run fine on it, but i'm not sure if that's your type of game.

For RPGs: all from Spiderweb Software should run fine. I liked Avadon: The Black Fortress and Avernum: Escape from the Pit

SpeedRunners!

Don't know how old are you but if you like retro/arcade type of games, the ever-expanding world of emulation is always there for you. With that specs you can perfectly run many things. MAME, SNES, MD/SG, etc. Or MarioKart 64 and play it forever... I still do it xD

Counter Strike 1.6
Counter Strike Source
Half Life 2
Postal 2
Vampire: The Masquerade – Bloodlines
Age of Mythology
Enter The Matrix
GTA III, Vice City, San Andreas (laggy)
WarCraft 3 + Frozen Throne | I believe DOTA 1
Need for Speed Underground 1 AND 2
The Lord of the Rings: The Return of the King

Emulator
NDS
PSX
N64

World of Goo may work, but I'm not sure.

plants vs zombies, angry birds, baldur's gate, deus ex 1

Starcraft. BloodRayne, No One Lives Forever 2: A Spy In H.A.R.M.'s Way, Monkey Island, Heroes of Might and Magic III, Diablo, Baldur's Gate, Return to Castle Wolfenstein, Little Fighter 2, Grim Fandango, The Sims, Quake, Age of Empires 2, Gang Garrison 2, Fallout 2, Halo, Max Payne 2, Iji, Lemmings, TIE FIghter, Freelancer, Counter-Strike, Hitman 1/2, Peggle, Ultima VII, Dune 2, Road Rash, Neo Geo emulator, Worms 2/Armageddon/World Party, Disney's Mickey Saves the Day, The Emperor's New Groove, Aladdin, System Shock 2, Command & Conquer: Red Alert/Red Alert 2and Pikachu Volleyball.

GTA V

Warcraft 3, CS 1.6 (and maybe CS Source), the first Deus Ex, Hitman 2: Silent Assassin. You can also emulate ps1, snes, n64, and other consoles games.

pain killer black edtion..knights and marchents..so on

1-Resident Evil 1,2,3,4,5
2-SpiderMan 1,2,3
3-Counter strike 1,6,source
4-Bully (FTW)
5-Assassin's Creed 1

Descent, Red Alert, Baldur's Gate, FTL, Luftrausers, Ring Runner, Teleglitch....

KKND Crossfire
The Settlers II maybe even the remake
Battle for Wesnoth
Sudden Strike 2
Battle Realms
Dungeon Keeper
Sacred Gold

Try Crysis 3 in 4K. Anyway NASA called they want their toaster back!

Got time to burn? Watch this series https://www.youtube.com/watch?v=Bo_XLomYKOw

A lot of good games.

Remembered childhood - age of empires 2 ;) also would recommend early total war games : Rome, medieval 1,2
Don't like strategies - best action games: max Payne 1,2, Star Wars battlefront 1,2
RPGs fan? : gothic 1,2,3 maybe even Arcania will run
And from your games - I would chose GTA SA and fallout

UnReal World RPG. It's hard. and it looks like shit. and it really is hard in a sense it's hard to learn, then hard to master. but hey, it's something!

the binding of isaac brooooo,you only need that gaem,marico.

You can put it in the toilet and watch it going down the water :)
I think minecraft maybe? Or flash games