https://steevenq.itch.io/zombie-invasion
Zombie Invasion is a 2D topdown survival and shooter game made with Unity and C#. Your goal in this game is to survive as long as possible, using your weapons to defend yourself and supply boxes to heal or replenish ammo. As the game progresses, surviving becomes more difficult, but your weapons will be far more superior through upgrades.
Source: itch.io