Serious Sam 4 won't rewrite the book for narrative FPS campaigns and that's perfectly fine. It sticks close to the series' roots while offering some contemporary improvements and improved presentation. If you're hankering for some straightforward shooting action that doesn't take itself too seriously, Sam "Serious" Stone's got your back.
Surgeon Simulator 2 leverages its predecessor's unique gameplay into a full-fledged experience with a story and co-op. Despite some positives here and there, annoying controls, boring puzzles and tedious gameplay make for an overall trying time.
Disintegration is a straightforward experiment that offers an intriguing if derivative world to explore and characters to like. Its FPS/strategy mix of gameplay is inherently limited, especially in multiplayer, but the campaign still makes for an enjoyable romp.
Despite its setting, XCOM: Chimera Squad is very much a spin-off from the main series. Its RPG-like characterizations and new mechanics gel well, even if it lacks some of the more defining features of its predecessors. Well worth a look, especially for those seeking a faster-paced tactical experience.
Mandate of Heaven may not be a total overhaul to the series' formula but it still offers a lot of new things. The familiar map and lackluster new units are offset by the entertaining new styles of play, new heroes and interesting events. Definitely worth checking out if you've been itching to get back into Three Kingdoms.