If you’ve lost an Axum Bacterial Culture sample in Subnautica 2 because it fell through the terrain, there is currently a no-mod workaround that allows you to reach the hidden space beneath the world geometry and collect it manually. While this is clearly not intended gameplay, it can be useful until an official fix is released.
| Quick Overview | Details |
|---|---|
| Resource | Axum Bacterial Culture |
| Respawns? | No |
| Total Known Samples | 5 |
| Required Vehicle | Tadpole (recommended) |
| Main Access Point | Heat Caves |
| Difficulty | Moderate |
| Estimated Time | 10–20 minutes |
| Mods Required | No |
Where the recovery route begins
The process starts in the Heat Caves. Inside this biome, you’ll need to locate a room containing a wall that lacks proper collision. Unlike normal cave walls, this section allows you to pass through and enter the empty space beneath the game world. Before moving further, place a beacon at the entrance. This makes returning much easier once you’ve collected the missing culture sample.
Because navigation under the map can be confusing, having a marked exit point prevents you from getting lost while exploring the hidden geometry.
How to reach bacteria samples beneath the map
Travel to the Heat Caves and locate the room with the collision-free wall. Place a beacon directly outside the entry point. This serves as your return marker.
Enter the gap and bring a Tadpole vehicle with you. The vehicle makes long-distance movement safer and more efficient beneath the terrain.
Begin navigating toward the Angel Combs region while remaining below the visible map geometry. Stay at safe depths while traveling. Players have reported being able to move hundreds of meters beneath the map without attracting hostile creatures.
Watch for glowing environmental markers. Green and yellow light sources can help identify the locations of missing Axum Bacterial Culture spawn points.
Once you locate the clipped culture sample, approach it carefully and collect it. Return to your beacon marker and exit through the same opening used to enter the under-map area.
How to recover bacteria from the central pit
Some players report losing samples in the central pit area rather than other regions of the map. These require a slightly different approach.
Travel to the central pit location. Move behind the metal farming structures. Locate the tipped-over unit positioned near the area.
Use this section to access the lower hidden layer beneath the map. Navigate carefully toward the clipped sample while keeping your depth under control.
Avoid swimming too high into the geometry above you, as doing so may trap you inside terrain and complicate your escape.
Why this method matters
Axum Bacterial Culture is particularly valuable because the current version of Subnautica 2 contains only a limited number of known samples. If one falls through the terrain due to a physics or collision issue, players may otherwise lose access to that resource permanently.
Until the developers add respawning, replacement methods, or bug fixes, recovering clipped samples manually remains one of the few ways to avoid losing progress tied to these materials.
| Tip | Reason |
|---|---|
| Place a beacon before entering | Makes finding the exit easier |
| Use a Tadpole | Faster and safer navigation |
| Stay below terrain layers | Reduces risk of getting stuck |
| Follow glowing landmarks | Helps locate spawn points |
| Move slowly near geometry | Prevents clipping into terrain |
| Plan extra time | Recovery attempts can be lengthy |
If an Axum Bacterial Culture sample disappears beneath the terrain in Subnautica 2, it is still possible to retrieve it by accessing the hidden space under the map through the Heat Caves. With a beacon, a Tadpole, and some patience, you can reach clipped spawn locations and recover these valuable non-respawning resources. While the process is not quick, it can save a playthrough from permanently losing one of the game’s rarest materials.
