Drowned God is a first person graphic adventure game about a future society confronting the aliens which were originally the gods of Egyptian, Christian, and other mythologies. It's essentially if ancient aliens was real, and humanity became advanced enough to have interests separate to them. Also, if I remember correctly, you talk to Jesus, and he's an alien who lives underwater. If that isn't intriguing enough to get Ross to check it out, I don't know what is.
I'd also be interested if Ross ever heard of Eastern Mind. It's a game made by the guy who made LSD: Dream Emulator, and while it's definitely strange enough to be notable, the exploration and puzzle solving are so esoteric, they make RAMA seem intuitive. Still, it's worth looking at, and if Ross ever does, I'll be sure to praise alien Jesus until he returns.