Physics, settings, and loot. All very important. Make sure its not generic. Most FPS games are similar, make yours unique! Gook luck
Thanks! I am not sure if players in my game will be able to loot, but I'll consider.
Even if it was just ammo. You could implement a mechanic where ammo is scarce, so you have to conserve it. If you do this, make sure to add a melee weapon.
