Minecraft Classic (The classic ver. of Minecraft!)
Chrome Dinosaur Game (The dinosaur game! This works offline too, make sure to click Install!)
WebCraft (Minecraft Classic clone! Click 1 finger [Left click] to break blocks, click 2 fingers [Right click] to place blocks!)
Paper Minecraft (Minecraft 2D!)
Friday Night Funkin'
Weeks 1-7 Vanilla (Fixed!)
If you're looking for other mods, you can check other sites as there are just too many to list here
Cave Story (A Metroidvania-style indie game by just one person!)
Ikachan (A shorter game by the developer of Cave Story! Swim, Ikachan!)
A Dance of Fire and Ice (One-button rhythm game from the developers of Rhythm Doctor!) [DEMO]
CUBE SLAM (A 3D version of Pong!)
Little Alchemy [Takes a while to load] (Merge elements to make more elements! Very addictive. Some images are broken.)
Robo Racer (A 3D Time Trials racer!)
Guitar Flash 3 (A browser version of Guitar Hero! Despite the name, it doesn't use Flash Player.)
Tunnel Rush (Go through a tunnel and fit through the walls! How far can you go?)
Cookie Clicker (Spam-click your mouse to collect cookies!)
SWERVE (Like the famous mobile game Dancing Line!)
Slope (Roll down endless paths! How long can you last??)
Space Buggy (A stunt racer, like 3D Hill Climb Racing!)
I Wanna Be Thy Copy (A clone of "I Wanna Be The Guy".)
Flappy Bird (Great Bird Simulator)