If you are watching the film, it follows a "found footage" style similar to Paranormal Activity .
Prove yourself: Use a Blood Test Kit on yourself to show you aren't an alien. The Thing Inside UsHD
Step 1: Use standard weapons (pistols, SMGs) to wear down their health until it's in the red. If you are watching the film, it follows
The film is dialogue-heavy and focuses on the psychological toll of a possible possession or alien presence within the home. If you are watching the film
Fix: Use Adrenaline shots to calm them down or move them to a well-lit, "safe" area.
Step 2: Use (Flamethrower, Molotovs, or Flare Gun) to finish them off permanently.
You cannot kill "Things" with just bullets.