For me it is FPS called Loadout. Devs have abandoned it years ago (probably due low player base) and moved to PS4 version.
It had the most unique weapon customization i have ever seen. Healing / boosting rocket launcher, healing / boosting sniper rifle, healing / boosting grenades and a lot more, guided rockets, different types of projectiles in general. Even their mods were improved. For example their version of CTF had big ass hammer instead of flag and you could instakill anybody with that in close combat. There was even amazing art style, the gore... oh my god. Less frustration, less tryhards... Sadly it was losing players quite fast after release, dunno why. It is still on steam but kinda dead.