This is a 2 player night hunter invasion from dying light. Night Hunter: Arrow keys to move, down arrow to pounce, "P" to use tendril locomotion. You can only use tendril locomotion if you have energy, and you can only pounce with full energy. Human: WASD to move, "E" to shine a UV light, this brings down the night hunter's energy if it hits the night hunter, and "Q" to attack. Use "E" to cancel the night hunter's pounce.
Sounds and idea from Dying Light.