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Play Global Defense (US_EU_BR edition · English · Edition 145589) Online
Global Defense
Play Global Defense online on Master System. Aim a satellite’s weapons while keeping the satellite away from incoming threats.
Browser play

Sega Master System — EmulatorJS controls
Default Player 1 keyboard mapping. Change keys in Controller Settings.
| Console button | Keyboard |
|---|---|
| ↑ / ↓ / ← / → | ↑ / ↓ / ← / → |
| 1 / START | X |
| 2 | Z |
Open Controller Settings to configure your keyboard or gamepad. Touch controls are available on mobile.
How to Play Global Defense
Quick start
Practise aiming and repositioning, then fire ahead of a moving target while leaving the satellite room to evade.
Controls
Use directional and satellite-movement actions to adjust aim or position. Use the firing action to attack.
Global Defense — About this game
The satellite and its aiming cursor have different jobs. Place shots ahead of moving targets while watching the satellite’s position, rather than steering directly toward every enemy. A target near the cursor can still be dangerous to the satellite, so check both areas of the screen. Shift to open space when an approach becomes crowded, then line up another shot. Balance aim and evasion instead of concentrating on only one of them.
Global Defense Game manuals
- Game manual 1
- Game manual 2
- Global Defense (en-gb,de,es,fr,it).pdf
- Global_Defense_SMS_EU_Manual.pdf
- Global Defense (ja).pdf
- SDISMSJPManual.pdf
- Global Defense (USA, Europe).pdf
- Global Defense (en).pdf
- Global Defense (pt).pdf
- GlobalDefense_SMS_BR_Manual.pdf
- 938_manuals_eu.pdf
- 938_manuals_jp.pdf
- 938_manuals_us.pdf
Cheats
No cheats have been added for this edition.
Player verification and sources
Browser play was reviewed before this edition was published in the catalogue. The date below is the catalogue publication date, not the game’s original release date.
- Browser test and catalogue publication date
- Browsers and devices
- PC: Chrome, Edge and Firefox. Mobile: Chrome on Android and Safari on iPhone and iPad.
- Player engine and core
- EmulatorJS 4.3.0-pre · segaMS
- Tested by
- rwEmulator
Sources and editorial basis
rwEmulator reviews edition metadata, release information, game manuals and first-hand browser-play notes. Available manuals are linked below; the editorial policy explains how facts are checked and corrections are handled.
- Game manual 1
- Game manual 2
- Global Defense (en-gb,de,es,fr,it).pdf
- Global_Defense_SMS_EU_Manual.pdf
- Global Defense (ja).pdf
- SDISMSJPManual.pdf
- Global Defense (USA, Europe).pdf
- Global Defense (en).pdf
- Global Defense (pt).pdf
- GlobalDefense_SMS_BR_Manual.pdf
- 938_manuals_eu.pdf
- 938_manuals_jp.pdf
- 938_manuals_us.pdf