
In this first-person rail shooter, originally released in 1983 for the ZX Spectrum by Imagine, take on the role of the pilot of a high tech Ground Skimmer, fighting to protect the lives of escaping refugees from waves of ruthless enemies.
Modeled estimate, not a reported figure. How we estimate →
Checked against 8 developer-reported gamesmedian error 4%
Trends
Concurrent players on Steam, one reading a day at about 15:00 UTC since Aug 13, 2026. Before then readings were taken at different times of day, spanning 22 hours, and Steam concurrency runs about 1.8x higher at its daily high than at its low — so some of the movement across that stretch is the clock, not the game.
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Showing the last 90 days (the review-based charts: the last 4 monthly points). Full history and CSV export come with a free account.
Momentum
Pace estimated from the game's recent review growth (our daily snapshots) at its own sales-per-review ratio — a momentum signal, not booked sales.
Related
Related
Related
| Game | Estimated lifetime revenue | Reviews | Review score | Price |
|---|---|---|---|---|
| approximately $112 | 2 | 100% | $2.99 | |
| approximately $84 | 1 | 100% | $4.49 | |
| approximately $34 | 1 | 100% | $1.99 | |
| — | 0 | — | — | |
| approximately $3.5M | 5.1K | 93% | $24.99 | |
| approximately $44.4K | 144 | 88% | $14.99 |