Raiden II is a legendary vertical-scrolling shoot ’em up developed by Seibu Kaihatsu and released in arcades in 1993. This Holland arcade ROM version brings the classic, high-octane bullet-dodging action to the browser. Known for its intense difficulty and spectacular weapon effects, it remains a standout title in the 90s shmup genre.
Your objective is to pilot the Raiden supersonic attack fighter through enemy territory, surviving waves of ground and air forces before defeating a massive boss at the end of each stage. For browser arcade controls, press Shift to insert a coin and Enter to start. Use the Arrow Keys to steer your ship, press Z to fire your primary weapons, and use X to unleash a devastating bomb.
Tips:
- When a weapon power-up appears, it cycles between colors. Wait for the color you want before grabbing it (Red for spread shot, Blue for straight laser, Purple for the iconic locking plasma laser).
- The purple plasma laser is excellent for crowd control, but the blue laser deals the most concentrated damage to bosses.
- Save your bombs for emergencies. Deploying a bomb not only damages enemies but also grants you brief invincibility and clears nearby bullets.

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