Welcome to this week's first 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.

As we've stated many times before, prices in the App Store change frequently. 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 our sister site Free App Alliance for daily recommendations of the best free apps the App Store has to offer.

Treasure Seekers: Visions of Gold (iPhone and iPad)

G5's Treasure Seekers: Visions of Gold sees you help a young girl and her brother unravel family mysteries and unearth a lost treasure that was hidden by their pirate grandmother.

If you want to get your hands on the lost trinket, you'll have to explore laboratories and underwater areas spread across more than 40 different levels, and overcome 19 challenging puzzles.

G5 has baked in support for Apple's Game Centre, so you can unlock glittering achievements as you search for your family's shiny treasure.

Download Treasure Seekers: Visions of Gold
Download Treasure Seekers: Visions of Gold HD

BigBot Smash (Universal)

Humans have been terrorising you for years simply because you're a big metallic (and slightly scary) robot. It's time to get your own back.

Your aim is to march across the globe; smash up cars, buildings, and whole cities; and recover the parts of your robot sweetheart that have been scattered about by the humans that dismantled her.

There are more than 20 different cities to destroy, a variety of game modes such as Survival and Speed Demolition, and various upgrades that boost the power of your robot.

Download BigBot Smash

Sentinel 3: Homeworld (Universal)

Sentinel 3: Homeworld sees you defend your precious planet against wave after wave of deadly alien attackers.

This tower defence title earned a prestigious Pocket Gamer Gold Award at review, and subsequently featured in our top ten best iPhone and iPod touch games of 2010 list.

There are 20 different levels spread across 14 unique maps, and 20 towers to utilise. You can unlock further levels through in-app purchases.

Download Sentinel 3: Homeworld