Gameplay and system changes affect consumables, deployables, accessibility/localization, audio, and narrative/progression tweaks to deepen survival and scientific play across Cascade and other locations.

Pets 2.0 overhaul expands the companion system with a new Companion Pet Slot and collar, taming Peccary variants, feeding mechanics, experience and mutation progression, and the ability to deploy pets in combat.

The update adds over 100 new items plus new recipes, furniture, inventions, cosmetics, quality-of-life updates, and bug fixes, with many items gated behind progression.

Abiotic Factor released the Cosmic Companions major update, marking the first significant post-launch content since the 1.0 release in mid-2025, and adding new systems, items, and a crossover adventure.

The patch notes lay out extensive changes across many areas, including a new portal world, Pets 2.0 specifics, Chemistry features, new wristwatches, broad item and weapon/gear changes, general gameplay adjustments, performance improvements, and numerous bug fixes.

The update introduces a Chemistry system with a Distillation Bench and Chemistry Bench, allowing players to distill resources and craft tinctures, weapon coatings, throwable flasks, and other concoctions with variable outcomes.

New weapons and gear join the lineup, including the Endothermic Hammer, Plasma Flail, Acid Mace, Hardlight Sledge, Volatile Helmet, and IS-128-B crafting options, alongside enhanced pet/companion mechanics and cosmetic unlockables.

A crossover with Voices of the Void brings Dunkeltaler Forest and a portal world accessed via Neutrino Mapper, introducing a new investigative quest line connected to unusual readings.