Although the graphics are …shall I say indie-game, and the English isn’t always the best (it was originally created in German, and translated to English), Stranded is a great game.
I personally prefer StrandedII, but you might prefer the original. Also, StrandedII is moddable. (For non-geeks, it basically means you can write scripts that add features and new units to the game.).
There are forums for help and tips here.