(Image credit: Deep Field Games) Abiotic Factor is already a massive game; you could easily spend 80+ hours exploring its sprawling, Black Mesa-ish research facility. But that hasn't stopped developer Deep Field Games further extending the tendrils of its labyrinthine, interdimensional science lab. Last December's "Holiday Cryosphere" update added a giant, living snowglobe that players could frolic festively around, and its latest patch opens up another strange dimension for your expeditious scientists to investigate. The Cosmic Companions update invites players to brave the Dunkeltaler Forest, a coniferous portal world home to the Alpen Signal Observatorium. Accessible via a portal in the Hydroplant, the portal world will challenge you to track down the source of the signal picked up by the Observatorium. Mysterious! While the pet system and new biome are the headline updates, arguably the most significant change in terms of actual gameplay is the introduction of a chemistry system.…