iFishing
This mobile fishing simulator is available for your WP7 devices. It’s not like the arcade games that are available in the market but it’s a simulator by Rocket Pocket Games.

You can grab it for $2.99.
Triad
A great puzzle game that is addictive and fun. There are tiles that are never identical and you have to make one of 256 patterns.

World wide high score and achievement tracking is there. If you like, you can play against your friend or you can go one-on-one with the computer.
You can get it for just$0.99.
Hangman Lite
Hangman Lite is a word puzzle game. This game is available in awesome and beautiful graphics. In this game, you have to guess the correct word to solve the puzzles. You can also use the visual hints to get a hint on how to solve.

You have to complete the secret word. Time is limited and you have to guess it within the given time. This game is not so easy to play. It’s a mind twisting game. As you expected, it’s free. So, feel free to install this classical and awesome game.