Browser based free games
Play free and free-to-play games designed to be played direclty in a browser (this includes both browser-based games and flash games)
Here are some of the best browser games you can play directly online: MMORPGs, collectible card games, strategy games and more. Browser games usually doesn't require nothing more than an updated browser (Chrome, Firefox, Edge, Opera, etc.) and are playable on any PC or Mac. Some of them may require a Flash plugin.
Help Free Games Utopia
Free Games Utopia is a completely free one-person project. If you wish to help, you can donate a few bucks. Thank you!

Daily Crossword
puzzle
zygomatic

The King's League: Odyssey
strategy
Kurechii

Bejeweled REMAKE
puzzle / tile-matching
szewczyk

Work!
simulation / typing
Moitapecha

Japan Castle Mahjong
strategy / mahjong
zygomatic

Quick Fire Pool Instant
action
Miniclip

Monochrome Mahjongg
puzzle / mahjong
Zygomatic

Beijing Hidden Objects
puzzle / hidden object
Zygomatic

Dead Estate Classic
shooter / shoot 'em up
Milkbar Lads

Cyberpunk Dreams
RPG
Late Night Games