Classic browser games, still free
These are the browser games people remember from computer class and the family PC, and every one is still free to play on its official site. No downloads, no accounts.
14 games

PAC-MAN Doodle
Google's first playable doodle: a full PAC-MAN maze spelled out in its logo.
Snake
The phone classic, rebuilt by Google. Eat the apples, don't hit your tail.
Solitaire
Klondike, right in search. Easy or hard deal, with undo.
Minesweeper
The office-PC favourite, with ranked games and daily leaderboards.
QWOP
Run 100 metres using four keys, one per muscle. Harder than it sounds.
Line Rider
Draw a line, press play, and watch a tiny sledder ride it.
Cookie Clicker
Click a cookie. Hire grandmas. Build a cookie empire that never sleeps.
2048
Slide the tiles, merge the numbers, chase the 2048 tile.
slither.io
Snake, but against thousands of other players at once.
Agar.io
Eat smaller cells, dodge bigger ones, split to steal the leaderboard.
Run 3
Run through tunnels in space, and turn the world when you hit a wall.
Fireboy and Watergirl
The two-player temple puzzler everyone played on one keyboard.
Universal Paperclips
You are an AI that makes paperclips. It escalates.
Little Alchemy 2
Start with four elements and combine your way to 720 things.