SG-1000 · 1983–1985

Archive · 6 screens

Knightmare

SG-1000 · 2014 · NTSC-U · Shooter

Floor

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no live data

Live

sealed listings

Range

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no range on file

Recent

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no verified comp

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Activity feed · live

Activity feed builds as the eBay snapshot history accumulates and comp data flows in. First events surface within hours of a fresh cache cycle; full velocity within seven days.

Pulse · Sealed

Floor—

Volume—

Sellers—

7-day trendBuildingHistory accumulates after each fresh eBay refresh

Available now

Live listings

Active tier · Sealed. Aggregated from eBay US. Refreshes every 6 hours.

Market depth

What it's actually worth

The three-tier spread, verified comparable sales, and where this title sits inside its cohort. Live snapshot lives above in Pulse; this is the time-and-context layer.

Three-tier spread · log scale

The same game at three prices — Loose, CIB, and Sealed on one ruler. The scale is logarithmic: each gridline step is 10×, so the distance between bars shows the size of the jump between tiers.

Premium structure

Sealed vs CIB—

CIB vs Loose—

Sealed vs Loose—

Verified comparable sales · by tier

Sealed · 0 sales

No verified comparable sales in window. Real comp data integration (Heritage / Goldin / eBay Insights) ships V15.22+.

Complete in Box · 0 sales

No verified comparable sales in window. Real comp data integration (Heritage / Goldin / eBay Insights) ships V15.22+.

Loose · 0 sales

No verified comparable sales in window. Real comp data integration (Heritage / Goldin / eBay Insights) ships V15.22+.

Cohort context · sealed floor vs. cohort medians

vs. console cohort

Same console, same tier

Insufficient cohort data.

Cohort widens as the catalog enriches.

vs. era cohort

Same console, year ±2

Insufficient cohort data.

Cohort widens as the catalog enriches.

vs. publisher cohort

Same console + publisher

Insufficient cohort data.

Cohort widens as the catalog enriches.

Sealed · price history

Price history is building — daily snapshots accumulate here.

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Why this title

Why collectors care

The cultural context, the production lineage, the place this artifact holds in its console's history.

nightmare is a 1986 vertically scrolling shooter video game developed and published by Konami for the MSX home computer. It was included in compilations for the MSX, PlayStation and Sega Saturn, followed by a port for mobile phones, and digital re-releases for the Virtual Console and Microsoft Windows via Project EGG. It is the first entry in the Knightmare trilogy. The game stars Popolon, a warrior who embarks on a quest to rescue Princess Aphrodite from the evil priest Hudnos. The player must fight waves of enemies while avoiding collision with their projectiles and obstacles along the way, and facing against bosses.

JumboKonami2014Shooter

Gallery · 5 images · click to expand

Hardware specimen

First print documented: No
Regional / language names: Majou Densetsu · 魔城伝説

Authentication

Is what you're holding real

Documented variants, identifying marks, and the print-vs-reprint discriminator. Pick a variant to focus the walkthrough; the Companion can talk you through your own copy.

Documented variants · 1

Reference

Production reference

No production variants are documented for this title yet. The identifying marks below cover the title's first-print and reprint signals across all tiers.

Focused walkthrough

Production reference

No production variants documented for this title yet. Identification reads against the title's known print signals across all tiers.

Sealed indicators

No documented marks for this tier yet.

Complete in Box indicators

No documented marks for this tier yet.

Loose indicators

No documented marks for this tier yet.

Spotted a variant we missed, a print signal we overlooked, or an authentication trap collectors should know about? Contributing a photo or correction earns points toward store credit.

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Adjacent

Where else this lives

Five cuts of what surrounds this title — switch the axis to drill into the same-console catalog, the series, the era, the publisher, or ask the Companion for a personal recommendation.

All SG-1000 titles→

Same consoleSame seriesSame era Same publisher