Active tier · Sealed. Aggregated from eBay US. Refreshes every 6 hours.
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.
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.
No verified comparable sales in window. Real comp data integration (Heritage / Goldin / eBay Insights) ships V15.22+.
No verified comparable sales in window. Real comp data integration (Heritage / Goldin / eBay Insights) ships V15.22+.
No verified comparable sales in window. Real comp data integration (Heritage / Goldin / eBay Insights) ships V15.22+.
The cultural context, the production lineage, the place this artifact holds in its console's history.
ontra is a 1987 run and gun game developed and published by Konami for arcades. A home version was released for the Nintendo Entertainment System in 1988, along with ports for various home computer formats, including the MSX2. The arcade and computer versions were localized as Gryzor in Europe, and the NES version as Probotector in the PAL region.
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.
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.
No production variants documented for this title yet. Identification reads against the title's known print signals across all tiers.
No documented marks for this tier yet.
No documented marks for this tier yet.
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.
How contributions work→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.
