Sony was roundly criticised throughout the PSP and PS Vita generations for not assigning is top first-party developers to its handheld platforms, but when Guerrilla Games turned its hand to the Japanese giant’s inaugural portable it churned out an all-timer. As opposed to trying to recreate the first-person perspective of the original PS2 Killzone, the Dutch developer transitioned to an isometric viewpoint for Killzone Liberation.
The result, while underappreciated, was incredible. This overhead shooter doesn’t have the tactics to be described a strategy game, but it’s more methodical than a twin-stick shooter, too – it’s perhaps best compared to a dungeon crawler, except you get to mow down Helghast with assault rifles instead of wield magic wands. The game’s pretty challenging – as most PSP titles of the era were – but if you’re a fan of the sci-fi series and have never played this, you must check it out.