スライドde懸賞 is a free puzzle game app developed by Ohte Inc. that allows users to win prizes while solving slide puzzles. This game is perfect for those who are looking for a free and popular slide puzzle app, or for those who want to play slide puzzles while participating in sweepstakes. The app offers a variety of puzzles with different levels of difficulty, including beautiful landscapes, world heritage sites, cute animals, and delicious food.

One of the main features of this app is the ability to earn points by completing puzzles, which can be used to enter sweepstakes and win prizes. The sweepstakes have a set number of winners and a deadline, and users can enter up to 300 times per sweepstake. The app also has a feature where users can register their email and receive notifications if they win. The prizes are delivered only within Japan, and the app does not charge any fees for participation.

Overall, スライドde懸賞 is a fun and engaging puzzle app that offers a unique opportunity to win prizes. The app is perfect for those who enjoy solving slide puzzles and want to participate in sweepstakes.