# Concentration

> HP 95LX game

**Wikidata**: [Q121599277](https://www.wikidata.org/wiki/Q121599277)  
**Source**: https://4ort.xyz/entity/concentration

## Summary
*Concentration* is a casual video game originally developed for the HP 95LX computer in 1992, based on the classic memory-matching card game. It later saw releases on Microsoft Windows and macOS as a free-to-play title distributed via Steam.

## Key Facts
- **Genre**: Casual game (Steam, 2025-07-18)
- **Author**: Ed Keefe (PalmTop Paper, 1992)
- **Platforms**: HP 95LX, Microsoft Windows, macOS (Steam, 2025-07-18)
- **Game Modes**: Multiplayer video game, player versus player, shared/splitscreen multiplayer (Steam, 2025-07-18)
- **Business Model**: Free-to-play (Steam, 2025-07-18)
- **Data Size**: 6.9 kilobytes (PalmTop Paper, 1992)
- **Publication Dates**: 1992 (original), 2024-10-14 (Steam release)
- **Distribution**: Digital distribution via Steam (2025-07-18)
- **Based On**: Memory (game)
- **Characteristic**: Indie game (Steam, 2025-07-18)

## FAQs
### Q: What is *Concentration*?
A: *Concentration* is a casual video game based on the classic memory-matching card game, originally released for the HP 95LX in 1992. It later appeared on Windows and macOS as a free-to-play title on Steam.

### Q: Who developed *Concentration*?
A: The game was developed by Ed Keefe, as documented in *The HP Palmtop Paper* (Jan/Feb 1992).

### Q: Is *Concentration* multiplayer?
A: Yes, the game supports multiplayer modes, including player versus player and shared/splitscreen multiplayer (Steam, 2025-07-18).

### Q: What platforms does *Concentration* run on?
A: The game was originally released for the HP 95LX and later adapted for Microsoft Windows and macOS (Steam, 2025-07-18).

### Q: How large is the game file?
A: The original version had a data size of 6.9 kilobytes (PalmTop Paper, 1992).

## Why It Matters
*Concentration* holds historical significance as one of the earliest digital adaptations of the classic memory game, bridging the gap between physical and digital entertainment. Its free-to-play model on Steam makes it accessible to a broad audience, while its multiplayer features cater to both casual and competitive players. The game’s development by Ed Keefe in 1992 reflects early experimentation with personal computing and interactive software, contributing to the evolution of casual gaming.

## Notable For
- **Indie Origins**: One of the first indie games adapted for modern platforms (Steam, 2025-07-18).
- **Cross-Platform Play**: Supports multiplayer across different operating systems (Windows, macOS).
- **Digital Preservation**: The original HP 95LX version is documented in *The HP Palmtop Paper* (Jan/Feb 1992).
- **Free-to-Play Innovation**: Pioneered the business model on Steam (2025-07-18).
- **Nostalgic Appeal**: Based on the timeless Memory game, appealing to both young and older players.

## Body
### Origins
*Concentration* was originally developed for the HP 95LX, a handheld computer released in the United States. The game was authored by Ed Keefe and published in *The HP Palmtop Paper* (Jan/Feb 1992). It was part of *THE DIVERSIONS DISK*, a collection of entertainment software for the HP 95LX.

### Gameplay
The game is based on the traditional Memory card game, where players match pairs of cards. It supports multiplayer modes, including player versus player and shared/splitscreen multiplayer (Steam, 2025-07-18). The original version had a compact data size of 6.9 kilobytes (PalmTop Paper, 1992).

### Platforms and Distribution
*Concentration* was later adapted for Microsoft Windows and macOS, distributed digitally via Steam (2025-07-18). The Steam release was published on 2024-10-14 and operates under a free-to-play business model. The game is classified as an indie title (Steam, 2025-07-18).

### Technical Details
The game’s original filename was *CONCEN.EXE* (PalmTop Paper, 1992). It has been assigned identifiers on platforms like Steam (ID: 2632190), VGChartz (ID: 20213), and GameSpot (ID: concentration). The game is described in English at [PalmTop Paper](https://www.palmtoppaper.com/ptphtml/1/ptp10018.htm).

### Legacy
*Concentration* remains notable for its historical context and adaptability across platforms. Its free-to-play model and multiplayer features continue to influence casual gaming trends. The game’s documentation in *The HP Palmtop Paper* underscores its role in early personal computing entertainment.

## References

1. [Source](https://www.palmtoppaper.com/ptphtml/1/ptp10018.htm)
2. Steam
3. GameSpot
4. Q124398839
5. VGChartz