Sega

Altered Beast (Sega Master System, 1989) Cib Complete - Tested

Name: Altered Beast (Sega Master System, 1989) Cib Complete - Tested
Brand: Sega
SKU: EBAY_267652075854

Bottom line: The Sega Altered Beast Cib Complete is a specs-and-price decision rather than a crowd-consensus one in the retro consoles category. Check the specification table below against one or two close alternatives — on price and spec fit, not on star ratings.

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By Mike Perry, Founder & Editor-in-Chief · Listing data updated 2026-08-13

Mike Perry — Hardware researcher since 2014. For retro consoles and console accessories, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference. About the author →

Before you buy

Check the listed dimensions, connectors and platform compatibility against your setup before ordering
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Manufacturer description

See photos. Complete in box, tested and working The product is a complete-in-box (CIB) tested copy of the video game "Altered Beast" for the Sega Master System released in 1989 by SEGA. This action and adventure game is a classic title in the platformer genre, known for its gameplay involving transforming the protagonist into various beasts to battle enemies and progress through levels. Perfect for collectors or fans of retro gaming, this game offers a nostalgic gaming experience on the Sega Master System console.

SpecPicks Verdict

SpecPicks scored Sega Altered Beast Cib Complete using a rating × review-volume × price-fit model applied to published specs and reviews across the retro consoles category. Sega's retro consoles lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for retro consoles of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Full Specifications

platform	Sega Master System

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Altered Beast (Sega Master System, 1989) Cib Complete - Tested is vintage hardware; the used and vintage market on eBay carries most of the live inventory. Prices and condition vary by seller and move in real time, so we link the live listing rather than quote a cached price. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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