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Rather than free exploration you were guided through missions with specific objectives to reach. Though Fusion did include exploration elements like its predecessors, it was slightly more linear than other games. (The DNA fusion also gave Samus a dope new suit.) Functionally this makes Samus part-metroid, and able to absorb the X-parasites in the same way that metroids would absorb the life energy of their prey. This time Samus is critically injured by a parasite only known as the X organism, and scientists give her an experimental vaccine made from Metroid DNA to save her life. The last chronological game before Metroid Dread, Fusion for the Game Boy Advance represents a later era of 2D Metroid that is both influenced by earlier games and forges its own path. We can only assume the mixed reception is why there has been no Other M2. Perhaps worst of all, it took one of gaming's most iconic heroines and made her doting and immature, and removed her agency in favor of a commanding officer.
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While Other M was still a decent game, scoring a 79 review average on GameSpot sister site Metacritic, it received criticism for its uneven difficulty, and especially for its groan-worthy story and voice acting. It was a daring mix of ideas, and not all of them worked. It was the first to feature melee combat, and the perspective was a mix of traditional 2D and Prime-like 3D. The project was spearheaded by Team Ninja, best known at the time for the Ninja Gaiden series, and as a result Other M was a very different kind of Metroid game. That all-killer, no-filler approach means a game that is merely pretty good, like Metroid: Other M, bottoms out the list. The Metroid series is incredibly small-just four main side-scrolling games and three first-person Metroid Prime games, along with a handful of remakes-and many of them are strong showcases of Nintendo's first-party prowess.
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