The Retro FPS template for Unity provides all you need to create a retro style first person shooter like in the good old times.

Features:
+ Create a retro style first person shooter
+ Different weapons, e. g. handguns, bombs, shotguns, laser guns, melee
+ Different enemies including a boss enemy + Dismember body parts by direct shooting or bombs
+ Pickup ammo, health and weapons you find on your way or in secret areas
+ Electro sound tracks and many sound fx effects

Itch.io:
https://assetcrew.itch.io/retro-fps

Teaser on Youtube: