After a few years out of the mainstream, the Metroid series has been enjoying something of a resurgence in recent years. 2017's Samus Returns proves there's still an appetite for classic 2D style Metroid gaming, while fans are still eagerly waiting on news of the much-anticipated fourth entry into the Metroid Prime sub-series.
Unlike its more successful counterparts Mario and Zelda, which have upgraded and reinvented themselves over the years, Metroid's formula remains largely similar to that of the the original game, with the series' various developers focusing more on perfecting the formula than experimentation and reinventing the wheel.
While the series' debut 3D title, 2002's Metroid Prime, seemed to bring the franchise up to speed with Nintendo's flagship franchises, fans have longed for a return to more traditional 2D-style gaming, with many discussions focusing on the merits of both gameplay styles.
A bridge to merge the two, Other M on the Nintendo Wii, proved unsuccessful, but the series is overflowing with standout titles in both two and three dimensions.
Metroid Prime 4 may be a bit of a way off yet, giving players plenty of time to revisit the other classic titles in the Metroid series. But which of Samus' outings remain must-plays, and which are better left alone?