Are there any free brain games?

Are there any free brain games?
Sudoku

MSN Games: TextTwist 2.
USA Today Games: Tri-Peaks Solitaire.
Zigiz: Treasure Hunt.
Kongregate: Entangled.
Happy Neuron: The Right Word.
AARP Games: Anagram Crossword.

Sudoku
  • MSN Games: TextTwist 2.
  • USA Today Games: Tri-Peaks Solitaire.
  • Zigiz: Treasure Hunt.
  • Kongregate: Entangled.
  • Happy Neuron: The Right Word.
  • AARP Games: Anagram Crossword.