Big Fish catches the iPad express to find The Serpent of Isis

US casual game publisher Big Fish seems to be pretty happy with its success to-date bringing its range of PC hidden object games to iOS, especially on iPad.

Indeed, its recent big Mother's Day sale saw it gain 15 iPad games in the US paid top 25 games chart.

So it's keeping on, keeping on, with the release of The Serpent of Isis, in conjunction with Irish developer BitRabbit.

It's a hidden object game that has you on the trail of the legendary Serpent of Isis, which was stolen from Egypt Museum in Cairo.

Starting out a little like DS game Professor Layton and Pandora's Box, you receive a mysterious letter and jump onto the Mont Palu Express train to find out more.

This provides the opportunity to do hidden object stuff in locations such as Bucharest, Vienna, London and Paris as you play through 10 chapters and over 20 mini-games.

You can play in a timed mode, or choose the relaxed mode to go at your own pace.

As for specific gameplay, the game has you combining inventory items to solve puzzles, which is often required to complete each scene, so it's not pure hidden item. You can also gain extra hints by finding bonus clues and suspect items.

And the usual help options are available if you get really stuck.

The Serpent of Isis is out now for iPad and free to download. The full game can be unlocked as an in-app purchase, priced $7.99, €5.99 or £4.99.