Altered Beast

Altered Beast for Sega Genesis and Mega Drive brings Sega’s 1988 arcade action game into the living room as a compact, myth-inspired side-scrolling brawler. Set in an imagined ancient world of ruined temples, graveyards, and hostile supernatural landscapes, it begins with one of Sega’s best-known openings: Zeus restores a fallen Roman centurion to life and sends him to rescue Athena from the underworld ruler Neff. The premise gives the game an immediate sense of spectacle, turning a straightforward arcade chase into a journey through monsters, resurrection, and metamorphosis.

The Genesis/Mega Drive release follows the arcade structure across five scrolling stages. Players advance from left to right, clearing crowds of undead and mythic creatures before confronting a different manifestation of Neff at the end of each area. Short scenes between stages keep Athena’s captivity in view, while the finish line is always a boss battle rather than a simple exit. The result is a brisk, score-driven game designed around memorizing enemy patterns, keeping momentum, and surviving a series of increasingly strange encounters.

At first, the resurrected warrior relies on a simple close-range moveset of punches, kicks, and jumps. The central mechanic arrives when white, two-headed wolves appear among the enemy groups. Defeating one releases a Spirit Ball, and each pickup makes the hero visibly larger and stronger. After collecting three Spirit Balls within a stage, the human fighter transforms into the powerful creature associated with that level. This escalating routine gives every level a clear rhythm: fight, power up, change form, then use the new abilities against Neff.

The beast transformations are the game’s defining attraction. Depending on the stage, the centurion becomes a werewolf, weredragon, werebear, weretiger, or golden werewolf, and each form changes the way attacks work. The dragon uses lightning and an electric barrier, the bear can petrify enemies with its breath, and the tiger fires a zigzagging burst. Wolf forms add projectile attacks and a forceful rush, making the transformed character dramatically more capable than the basic human fighter. Watching the sprite grow through the three power-up levels before the full transformation remains one of the signature visual moments of Sega’s early 16-bit era.

This version also supports two players at once on the same screen. A second centurion can join the rescue, allowing two people to punch through enemy waves and race for Spirit Balls together. Cooperation can make the action more manageable, but the shared screen and limited room around foes also preserve the hectic arcade feel. Difficulty settings and continues add replay value to a game that can otherwise be completed in a relatively short session once its stage layouts and boss patterns are understood.

Developed and published by Sega, Altered Beast was an important showcase title for the Genesis and Mega Drive during the system’s launch period. The original arcade game was directed by Makoto Uchida and ran on Sega’s System 16 hardware; its home conversion retained the core animation, transformation idea, and two-player action while adapting them to Sega’s console. The Genesis became particularly associated with Altered Beast because the game was included with the hardware in North America and Europe before Sonic the Hedgehog replaced it as the pack-in title. For many early owners, it was an introduction to the promise of arcade-style action at home.

The port is not identical to the arcade original, but it preserves the elements that made the game memorable: the dramatic voice samples, oversized enemy sprites, Greek-inspired horror imagery, and fast route from ordinary fighter to screen-filling monster. Its controls and presentation reflect an early generation of Mega Drive software, with a deliberately simple design focused on immediate action rather than long exploration. That directness is part of its appeal: Altered Beast asks players to learn its small set of stages, claim every power-up they can, and turn Zeus’s champion into the right beast for the next demon.

Decades later, Altered Beast remains a recognizable part of Sega’s catalog and of Genesis/Mega Drive history. It has returned in compilations and later re-releases, but the 16-bit cartridge version is especially tied to the console’s formative identity. Whether played alone for a quick arcade challenge or in two-player co-op, it captures an era when a vivid transformation sequence and a memorable opening command could define a system’s first impression.