About Crimson Mender

Keep your party alive by bleeding yourself, draining ghouls, and pumping stolen blood into your friends.

On a computer: WASD move, hold click to drain, Space to cut yourself, E to transfuse
On a phone: Left stick to move; buttons Drain, Cut and Give on the right

Bruno described this game in a sentence on OhMyGames and the AI built it. You can make your own the same way, free to start.