Both Head Shot and Shot Shot Tactic, are extremely similar borderline scams from the same "dev" IGP.
Released in Early Access very close to one another, with the same choice of "Multiplayer FPS with just a few maps and barebones content", left abandoned for people to pick it up out of curiosity.
It doesn't take much perception to notice that it is 99% an asset flip, with just template gamemodes, resold as a standalone scam masquerading as a game. Especially funny with how awful the english is in both the store pages and menus, it is probably some ESL Andy that couldn't even use an online translator correctly.
I do not remember how I got hold of the keys for both of these products, but it is not just a "not recommended" from me, make sure to actively avoid it.