I’m not quite sure about the specifics of the reverbs he uses but this is something that what I mean about how much it adds to the atmosphere, or rather entirely creates the atmosphere; Stream 'FREE FROM FEAR' // Resident Evil III Save Room Theme Cover by Sea Elegy | Listen online for free on SoundCloud
I’m not saying the exact same reverb will work, but I think you have too little and too short to create the atmosphere you’re going for. I don’t know what settings he has the reverb on, but I know he’s using Reverence and some long time like 10-20 seconds. It’s an in real life friends channel, so he won’t mind me linking it as an example. It’d be cool if you can try it and post for comparison. 