Two fan favorite titles have recently found their way onto the PlayStation Portable's Greatest Hit list: Ratchet & Clank: Size Matters and Killzone: Liberation. Whether you're new to either series or just want to take a walk down memory lane, this is definitely a good time to revisit both games for the handheld.

You can relive all the fun moments of taking out hordes of Technomites in Ratchet & Clank using all those weapons and gadgets at your disposal. On the other hand, if taking on covert operations and saving hostages is your thing then Killzone: Liberation should definitely be an enjoyable title to play with its new budget price.

Whether you feel like taking on an army of robotic critters or squads real-life military troops, both titles are currently being offered at the rock bottom price of US$ 19.99. This offer is definitely a good way to introduce those who missed playing either title when they first came out, so go ahead and order them from your favorite retail store.