Released in 1982 by Gottlieb, Reactor arrived during one of the most competitive periods in arcade history, when the market was flooded with space shooters and maze games following the explosive success of titles like Space Invaders, Asteroids, and Pac-Man. Gottlieb, a company with deep roots in pinball manufacturing, had been making a steady push into video arcade cabinets, and Reactor represented one of their more technically ambitious efforts of the era. The game places the player in control of a ship navigating the interior of a nuclear reactor, tasked with destroying a pulsating core at the center of each stage before it overloads. The cabinet used a trackball controller rather than a joystick, a deliberate design choice that gave the game a distinctly fluid feel compared to its eight-directional peers. Players roll the trackball to thrust their ship in any direction, with momentum and inertia playing a significant role in movement — the ship does not stop instantly, meaning players must anticipate their trajectory and plan maneuvers in advance. The reactor chamber is populated by a variety of enemy particles and subatomic hazards that bounce around the play field. Players can destroy enemies by shooting them or by using the environment itself: herding enemies into the central reactor core destroys them and simultaneously damages the core, rewarding skillful crowd control over simple point-and-shoot tactics. The walls of the chamber are also lethal, and the combination of inertia-based movement and deadly boundaries creates a constant tension between aggression and survival. Each stage increases in difficulty as the core pulses faster and enemy density rises. The game also featured a distinctive synthesized voice, a notable technical flourish for 1982, which called out warnings and taunts during play — a feature that helped Reactor stand out on a crowded arcade floor. In its original arcade run, Reactor attracted players who appreciated its physics-driven mechanics and the strategic depth of using enemies as weapons against the core, though it never achieved the mass-market dominance of the era's biggest hits. It was later ported to the Atari 2600 by Parker Brothers in 1983, bringing the concept to home audiences, though the trackball's nuance was inevitably lost in translation to a standard joystick. Within the arcade landscape of 1982, Reactor occupies a notable niche as a game that prioritized emergent, physics-aware gameplay at a time when most competitors relied on fixed patterns and rote memorization.
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Reactor
反应堆
Reactor is an action arcade game released by Gottlieb in 1982. The player controls a small craft inside a reactor core, navigating through hazardous environments while avoiding or destroying enemies. The objective is to repair the reactor by moving through its chambers and neutralizing threats. Players use joystick controls to maneuver their ship across the screen. The game features multiple waves of increasing difficulty, with enemies spawning in patterns that escalate as the player progresses through levels. Reactor combines navigation and combat elements within a confined reactor setting.
- Developer
- Gottlieb
- Released
- 1982
- Platform
- Arcade
- Genre
- Action
- Rating
- 4.8 / 5 (4.6K)
- Last updated
About Reactor
What makes it special
Reactor is one of the earliest arcade games to feature digitized speech as an integrated gameplay element, with a synthesized voice delivering in-game warnings and commentary in 1982 — a technical achievement that was genuinely rare on the arcade floor at the time. Beyond the audio novelty, the core mechanic of using enemy particles as projectiles against the reactor itself was a forward-thinking design idea: rather than simply shooting everything on screen, players are rewarded for herding and redirecting enemies, giving the game a layer of strategic depth that distinguished it from the era's more straightforward shooters.
Pro tips
- Use the trackball with short, controlled bursts rather than aggressive spinning — the ship's inertia will carry you into walls if you over-correct.
- Herd multiple enemy particles toward the reactor core simultaneously to deal burst damage and clear the field at the same time, rather than shooting enemies one by one.
- Stay near the outer edges of the chamber when the core is pulsing rapidly — this gives you more reaction time to avoid the energy bursts emanating from the center.
- Learn the bounce angles of the chamber walls; enemy particles ricochet predictably, and you can position yourself to funnel them toward the core without direct contact.
- Prioritize survival over score in early rounds — mastering the inertia-based movement is the single most important skill, and it takes several plays to internalize.
Reactor Controls — Arcade Keyboard Keys
Default keyboard bindings for Reactor on our in-browser Arcade emulator. Plug in a USB or Bluetooth gamepad to auto-detect mappings, or rebind any key from the emulator settings menu.
| Keyboard | Console button | Typical use |
|---|---|---|
| ↑ | Joystick Up | Move up |
| ↓ | Joystick Down | Move down |
| ← | Joystick Left | Move left |
| → | Joystick Right | Move right |
| X | Button 1 | Primary action (jump / confirm) |
| Z | Button 2 | Secondary action (attack / cancel) |
| S | Button 3 | Tertiary action |
| A | Button 4 | Quaternary action |
| Q | Button 5 | Fifth button |
| W | Button 6 | Sixth button |
| 5 | Insert Coin | Insert coin |
| 1 | 1P Start | Start / Pause |
Coin and Start are convention "Insert Coin: 5" and "1P Start: 1". Some arcade boards expect specific button mappings — check the in-game prompts on coin-up.
Rebind any key from the EmulatorJS in-game settings menu (gear icon → Controls). A connected gamepad auto-maps to the same buttons.
Reactor Longplay & Gameplay Videos
Watch a full playthrough of Reactor on Arcade before you dive in — recommended for getting a feel for the game's pacing, story beats, and difficulty curve.
Watch longplay on YouTube
"Reactor" Arcade longplay 1982
External references
Frequently Asked Questions
When was Reactor released?
Reactor was released in 1982 for the Arcade.
Who developed Reactor?
Reactor was developed by Gottlieb, available to play in your browser on RetroGameSpace.
What type of game is Reactor?
Reactor is a Action game for the Arcade, playable instantly in your browser — no downloads, no installs.
How can I play Reactor for free?
Open this page and click "Play Now" — Reactor runs free in your browser via WebAssembly emulation. No account, no payment, no installer.
Do I need to download anything to play Reactor in the browser?
No. Reactor streams from a public archive into a browser-side Arcade emulator. Nothing is installed on your computer.
Can I save my progress in Reactor?
Yes. Save states are stored in your browser (IndexedDB) per game, and you can also use any in-game save the original Arcade cartridge supported.
Does Reactor work on mobile devices?
Yes — the Arcade emulator runs on iOS Safari and Android Chrome. Touch controls overlay the game; landscape mode is recommended.
Is it legal to play Reactor this way?
RetroGameSpace is a transient caching reverse-proxy and does not host first-party copies of Reactor. Game files are fetched on demand from publicly-accessible archives. You are responsible for compliance with your local laws and the bring-your-own-ROM principle.
Is Reactor difficult for new players?
Yes. The trackball-driven inertia system is unlike most arcade games of the era and has a genuine learning curve. New players frequently crash into walls while adjusting to the momentum mechanics. Expect several sessions before movement feels natural.
What is the best starting strategy for Reactor?
Focus entirely on movement control in your first few plays. Avoid the center of the chamber, keep your speed low, and practice nudging enemies toward the core rather than shooting them. Aggressive play before mastering inertia leads to quick deaths.
What is a common mistake new players make?
Over-spinning the trackball. The ship builds speed quickly and the walls are instantly lethal, so new players who move too fast find themselves unable to stop before colliding. Small, deliberate trackball movements are far more effective than fast ones.
Is Reactor worth playing today?
For players interested in arcade history and physics-based design, yes. The trackball controls and enemy-herding mechanics feel distinct even by modern standards. Access via original cabinet or the Atari 2600 port (Parker Brothers, 1983) are the primary options, with the arcade version being the definitive experience.
