Zombie Island 3D is a first-person survival shooter on an island overrun with zombies: you find ammunition and health packs scattered around, and clear the island one area at a time.
Ammunition scarcity is what makes it survival rather than action — you can't shoot your way out of every situation, so knowing when to retreat matters.
Clear the island of zombies, finding the ammunition and health packs hidden around it to keep going.
Yes — which is what makes it a survival game. You can't shoot through every encounter, so retreating and searching matters.
Yes, though it's a 3D shooter — close other tabs on older hardware.