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The PSP version of The 40th Day offers a top-down perspective, differing from the console versions' third-person view. Players control Rios and Salem through various missions, employing a cover system and cooperative tactics. The game features a morality system where players' choices impact the storyline, including decisions that can affect the characters' fates .​

In Formula Front, players assume the role of an "Architect"—a designer and programmer who builds and tunes AI-controlled mechs, known as u/ACs (unmanned Armored Cores). These mechs compete in arena battles without direct player control. The primary challenge lies in customizing the mech's parts and programming its AI to perform effectively in combat. The North American release introduced the option to control the mech directly, referred to as a N-u/AC (Naked u/AC), though this mode is considered challenging due to the PSP's controls .​

Ape Escape: On the Loose is a platformer developed by Sony Computer Entertainment for the PlayStation Portable (PSP), released on March 17, 2005. It serves as a faithful remake of the original Ape Escape (1999), adapted for the PSP's controls and features.​  

In Ape Escape: On the Loose, players control Spike as he journeys through time to capture over 200 mischievous monkeys that have been sent by the villainous Specter to alter history. Armed with a variety of gadgets, including the Stun Club, Slingshot, and Sky Flyer, players navigate through vibrant levels set in diverse eras such as the Lost Land, Oceana, and Medieval Mayhem. IGN​

The game introduces a "TimeStation" hub, from which players can access main levels, mini-games, tutorials, and save/load options. Each era comprises multiple stages filled with obstacles and enemies, culminating in boss battles.

Given the PSP's single analog stick, the controls have been adapted from the original PlayStation version. Movement is handled with the D-pad or analog stick, while gadgets are assigned to the face buttons. For instance, the Stun Club and Time Net are used by pressing the corresponding button, and gadgets that previously required analog rotation now function with rapid button presses.

Ape Escape: On the Loose includes several mini-games that can be unlocked by collecting Specter Coins scattered throughout the main levels:​

• Specter Boxing: Engage in one-on-one boxing matches against various monkeys.​Ski Kidz Racing: Race down snowy slopes, performing tricks to boost your speed.​

• Ape Ping Pong: A fast-paced table tennis game where players can unleash powerful smashes.​

• Jake Attacks: A cooperative obstacle course where players control Spike and his rival Jake to reach the finish line first. ​

These mini-games offer additional content and can be enjoyed solo or with a friend via local wireless multiplayer.

Ape Academy 2 is a party game developed by Shift and Alvion, published by Sony Computer Entertainment for the PlayStation Portable (PSP). It serves as the sequel to Ape Escape Academy and was released in Japan on December 15, 2005, followed by European and Australian releases in 2006. Notably, it was not initially released in North America. However, on March 21, 2023, it was re-released worldwide as a PSP Classic for PlayStation 4 and PlayStation 5, marking its first official North American release   In Ape Academy 2, players engage in a unique blend of card battles and mini-games. The antagonist, Specter, has introduced a new card game that has become immensely popular among both humans and monkeys. Players must collect and strategically use over 300 cards in a rock-paper-scissors format to determine which mini-game will be played next. Winning these mini-games allows players to advance through various islands, each culminating in a boss battle. The ultimate goal is to defeat Specter and claim the rare "Platinum Specter" card and a year's supply of bananas   Ape Academy 2 received mixed reviews. Critics appreciated the variety of mini-games but noted that the card battle system could lead to repetitive gameplay. Some players found the structure limiting, as it often forced them to replay the same mini-games to progress .​

Aliens vs. Predator: Requiem is a third-person action game developed by Rebellion Developments and released in 2007 for the Sony PSP. It serves as a tie-in to the 2007 film of the same name, placing players in the role of a Predator tasked with eradicating Aliens in the small town of Gunnison, Colorado.

• Perspective & Combat: Players control the Predator in a third-person view, utilizing a variety of weapons such as wrist blades, shoulder cannons, and an energy pistol. A first-person mode is available for targeting ranged attacks. The game includes stealth elements like cloaking and multiple vision modes, including infrared, to detect enemies. ​eBay+2Alien vs. Predator Galaxy+2Wikipedia+2

• Honor System: Actions are scored based on honor; killing civilians or unnecessary violence lowers your score, while precise attacks and stealthy kills earn higher points. These points can be used to upgrade weapons and abilities between missions. ​Worthplaying+2Wikipedia+2eBay+2Alien vs. Predator Galaxy

• Skirmish Mode: A time-limited mode where players eliminate as many Aliens as possible within five minutes. This mode supports two-player co-op via the PSP's ad-hoc wireless feature. ​eBayAlien vs. Predator Galaxy

Alien Zombie Death is a fast-paced 2D platformer developed by PomPom Games for the PlayStation Portable (PSP), released on March 25, 2010. Part of the PSP Minis lineup, it offers quick, action-packed gameplay ideal for short sessions.

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In Alien Zombie Death, players control a lone spaceman defending mining platforms from relentless waves of alien zombies. The game features 14 levels, each set on different planets with unique moons. Players navigate multi-level platforms, dodging environmental hazards and battling various alien enemies. The objective is to survive as long as possible, earning medals for achievements such as collecting coins or defeating specific types of aliens. These medals unlock new levels and increase replayability.​

Aces of War is a World War II aerial combat simulator for the PSP, featuring over 40 authentic aircraft and historically inspired missions. Choose between arcade or simulation modes as you engage in intense dogfights and bombing runs across iconic WWII battlefields. With multiple game modes and a replay system, it offers both action-packed gameplay and strategic flight experiences on the go.