Free iPhone and iPad games: Tiny Invaders, Boost 2

Welcome to this week's third 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, 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 the Free App Alliance iPhone app for daily recommendations of the best free apps the App Store has to offer.

Each level in this disease-filled puzzler tasks you with guiding a bunch of intergalactic germs around a human host and avoiding pesky white blood cells. Your mission: to successfully infect your way towards the President of the United States.

The development studio behind this game was set up by former Bizarre Creations developers Ben Ward and Peter Collier, as well as Geometry Wars creator Stephen Cakebread.

Boost 2 is an incredibly fast tunnel racer in which you, well, race through obstacle-filled tunnels.

This title has several game modes to delve into, online multiplayer, and a whole bunch of OpenFeint and Game Center achievements. There are also leaderboards, in case you're into that kind of thing.