https://store.steampowered.com/app/1794680/Vampire_Survivors/

Mow down thousands of night creatures and survive until dawn!
Vampire Survivors is a gothic horror casual game with rogue-lite elements, where your choices can allow you to quickly snowball against the hundreds of monsters that get thrown at you.

Activating the steam key

1) You must download and install Steam http://steampowered.com/download/SteamInstall.msi (if not already installed).
2) Create a new account on Steam or go to an existing one.
3) Select "Activate via Steam ..." in the "My Games" section, and enter the key received after payment.
4) After activation, the game will appear in your list of games and you can install it.

Please leave feedback after successful activation of the game.