UFPS is a professional FPS base platform for Unity.

You can use any script in this game, but don't use blood effect and weapon models. Blood Effect is sales on Unity Asset Store, and it's not my resource so you could have disadvantage or might be subject to legal regulations. Weapon models are from https://www.cgtrader.com/, I used free models but I'm not sure they can use for commercial purpose.

Shooter IO is multiplayer shooting arena game template which integrated UNET for networking

Поделился - Александр Бурмистров

First Person Shooter Multiplayer Example. 
FPSME is fairly simple but fully functional example of a first person multiplayer shooter in Unity using Photon Unity Networking!

Shooter IO is multiplayer shooting arena game template which integrated UNET for networking

WARNING: Do not import Photon before importing the Kit. The kit comes with Photon + Photon Voice ready for usage. 

Battle IO is multiplayer battle arena game template which integrated UNET for networking

MFPS 2.0 is a advance multiplayer first person game kit for start develop your own online fps game, this kit include all the basis and some advance systems that all multiplayer shooter require.

EZFPS is the ultimate multiplayer first person shooter template for Unity3d! Using Photon Unity Networking, EZFPS is designed to make an FPS Deathmatch style game, with Ai bots, zombies, player classes, weapon loadouts, weapon skins and attachments, and player customization.

UNET Multiplayer Survival Game. 

This project provided a useful template and tools to help you create your open world multiplayer game in a few steps. the project includes difference enemies with optimized AI and difference functioning items like Gun , Sword , Grenade , Food and more you can also craft, hunt, or build your base and play around with your friends by drive a Car, This project also ready for a several shooting gameplay styles such as Team / Death match , Co-op Survival Horror , Zombie Swarm , You can create your world, custom your rule and enjoy with your friends.