The 042-series Alterra Submersible Cave Exploration Droid from Subnautica.
This guy was scrapped in the end and remained purely a concept, but it would have been an automated probe deployed by the Cyclops sub to investigate caves (relatively) risk-free.
Here it is encountering the (also unimplemented) "Cave Thing" (likely an early version of the also scrapped Grabcrab) from the player’s perspective. Evidenced by Ryley’s reflection, this guy would’ve been pretty small.
The droid has the unit designation "6872" on its side. Unlike the Camera Drones this machine would’ve been fully autonomous.














