Welcome to another instalment of Pocket Gamer's free game round-up - a feature that highlights the top App Store titles that have been made free in the past 24 hours.

Get in quickly, though. Prices in the App Store change frequently, so grab these freebies before you miss out on a top bargain.

Remember to let us and your fellow readers know about any other great free apps in our comments section below.

Additionally, you can find out about all the latest App Store updates, price drops, and more by using the cleverly hidden hyperlink in this paragraph.

And if you're craving even more quality freebies, be sure to check out the Free App Alliance iPhone app for daily recommendations of the best free apps the App Store has to offer.

King of Opera
By Tuokio Inc. - download for iPhone and iPad

In King of Opera, you have to fight your way to fame and fortune. You can battle it out against AI-controlled opponents or against up to three other players from around the world.

Basically, you take control of a tenor who spins wildly in circles, and attempt to knock your rival tenors off-stage.

Back in June, this spin-'em-up received Game Center support in an update. There are ten different trophies to bag.

Bounty Avenger
By OniArt - download for iPhone and iPad

Evil scientists have created a cyborg army that's hell-bent on destroying everything in its path. Luckily, you're a bit of a badass, and you have a rather impressive arsenal of powerful weapons at your disposal.

This action-packed title features an unlimited number of stages, and plenty of Game Center-powered leaderboards and achievements.