Hashi

Named Hashiwokakero in Japan, shortened to Hashi and in English it is also known as Bridges. This is a fantastic puzzler with one simple objective that will challenge all of your logic and puzzle solving skills to the limit.

Hashi is made up of a grid of islands, each island contains a number, you must figure out how to connect the islands together with bridges using the following rules;
Bridges can only run horizontally or vertically. The total number of bridges reaching each island must be equal to the number inside the island. A maximum of two bridges must run in parallel between two islands. No bridge can cross another bridge or an island. All the islands must be connected together to form a continuous path, yet adhering to the above rules.