Alpha 3 is probably the closest to a proper stealth horror game promised, but alpha 1 and 2 delivered on the true promise that fundraised the game in the first place, which was the self learning ai. Alpha 1 and 2 I struggle to say the gameplay is better, as they're honestly just more sandbox-like.
Tinybuild tested the waters, and props to them. And the light is awful for the stealth aspect when crouched, as it's 'all the way over there'. Gameplay-wise, impossible to play without the flashlight and game-breaking mentality. However, the house is as if the neighbor never even touched half of it, he cannot climb ladders or anything, not even what was seen in the alpha 2 trailer. I've always been a strong believer in having things that can stand on their own, like csgo auto generated pathfinding, minecraft xbox 360 homemade custom game modes, and hello neighbor's adaptive ai. It's beautiful stylistically, though the scale of everything was way too much, and way too unrefined.