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Play Gradius: The Interstellar Assault (Japan edition · English) Online
Nemesis II
Play Gradius: The Interstellar Assault online on Game Boy. Gradius: The Interstellar Assault sends Vic Viper through a connected horizontal shooting campaign against Bacterion’s forces.
Browser play
Game Boy (GB) — EmulatorJS controls
Default Player 1 keyboard mapping. Change keys in Controller Settings.
| Console button | Keyboard |
|---|---|
| ↑ / ↓ / ← / → | ↑ / ↓ / ← / → |
| A / B | Z / X |
| START / SELECT | Enter / V |
Open Controller Settings to configure your keyboard or gamepad. Touch controls are available on mobile.
How to Play Gradius: The Interstellar Assault
Quick start
Choose Practice to learn a section, then select a weapon layout for the main game. Fire with B and activate the highlighted upgrade with A only when it is the equipment you want next.
Controls
D-pad: move; B: fire; A: activate selected power-up; START: pause. Default layout; A/B can be reversed in options.
Gradius: The Interstellar Assault — About this game
Gradius: The Interstellar Assault sends Vic Viper through a connected horizontal shooting campaign against Bacterion’s forces. Collect capsules to move along the power-up bar, then decide when to activate speed, missiles, guns or protection. Weapon selection before the sortie lets you shape the loadout, but surviving the terrain still depends on leaving room to dodge.
Choose Practice to learn a section, then select a weapon layout for the main game. Fire with B and activate the highlighted upgrade with A only when it is the equipment you want next.
Gradius: The Interstellar Assault Game manuals
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 · gb
- 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.