The fourth game in the METAL GEAR series: set over two incidents in 2007 and 2009, featuring Solid Snake and Raiden, introducing new stealth gameplay features.
Players must utilize a variety of stealth techniques to sneak through environments and avoid or neutralize enemy patrols. This includes hiding in lockers, crawling through vents, sneaking up behind guards to perform non-lethal take-downs, and using items like chaff grenades to disable enemy sensors. The game rewards players for completing objectives without being detected, encouraging a methodical, careful approach.
The game introduces the ability to aim and shoot weapons in a first-person view, giving players more precise control when engaging enemies. Players can also hold up enemies at gunpoint, allowing them to neutralize threats non-lethally. Additionally, the ability to grab and drag unconscious enemies allows for more control over the environment and hiding bodies.
The stealth-focused design creates many opportunities for emergent gameplay. Players can experiment with different approaches, using the environment and available items in creative ways to overcome challenges. This includes distracting guards by throwing objects, looping their patrol routes, or using water to obscure movements. This encourages player agency and rewards experimentation.
The game's boss battles are praised for their creativity and challenge. These encounters often require players to observe patterns, exploit weaknesses, and utilize the full range of their abilities to emerge victorious. The variety of boss types, from human mercenaries to towering mech units, keeps these battles engaging and memorable.