# One Arena. Endless Waves. Two Thumbs.
**Protocol 90** is pure arcade twin-stick action. No 30-minute tutorial. No cutscenes to skip. Just jump in, play, die, try again. And then try one more time—because you know you'll make it past Wave 12 this time.
No fixed buttons to fumble for. The twin virtual sticks appear exactly where your thumbs land: the left stick moves, the right stick aims and fires instantly. No separate fire button to panic-search—just aim and shoot.
The result is fast, responsive controls that never let you down when the arena fills with enemies.
## FOUR ENEMIES. FOUR DIFFERENT THREATS.
You're not fighting a mindless horde. Every wave mixes enemy types, and each one forces you to make a different decision.
* **Grunts** overwhelm you with numbers, taking away your space.
* **Runners** are fast and fragile. Ignore them, and they'll catch you.
* **Tanks** soak up punishment and hit hard on contact. Beat them with positioning, not firepower.
* **Snipers** don't chase you. They stay at a distance and pick you off while you're busy dealing with everything else.
The challenge isn't just aiming well. It's deciding, every second, who needs to die first.
## ENDLESS WAVES. NO MERCY.
There are no levels to beat—only a record to break.
With every wave, enemies become tougher, faster, and more numerous. Between waves you'll get a few precious seconds to catch your breath and recover a bit of health. Use them wisely, because the next wave will be even worse.
Sooner or later, you'll fall.
The only question is: **how far can you get?**
## GLOBAL LEADERBOARD
The global Top 50 is there to remind you that someone, somewhere, survived longer than you.
**Arcade twin-stick shooter. Survive endless waves, climb the global leaderboard