The Thing Inside Ushd -

Gain trust: Give them weapons, ammo, or heal them with health packs.

You cannot kill "Things" with just bullets. The Thing Inside UsHD

Prove yourself: Use a Blood Test Kit on yourself to show you aren't an alien. Gain trust: Give them weapons, ammo, or heal

If you are watching the film, it follows a "found footage" style similar to Paranormal Activity . Gain trust: Give them weapons