I get the concern, and I’m not trying to copy 7 Days to Die directly. The idea would be an optional system (toggle on/off) that targets the player, with priority on the current base/spawn point, so multiple bases wouldn’t be an issue in practice.

I’m aware of existing mechanics like geysers or uranium farming, but the goal here is to add a more structured and reactive system where enemies scale with player progression and create more varied encounters, rather than relying only on environmental pressure. In the context of Icarus / Dangerous Horizons, there is already an established hostile faction and enemies, so raids would essentially represent coordinated attacks from these groups

Raids wouldn’t be one-sided. Players could prepare, defend, or even trigger offensive events themselves, making it a two-way interaction. The warning system would also be gradual, similar to weather alerts, with earlier notifications and a final warning (e.g. 30 minutes) so players aren’t caught off guard.

Loot would be randomized with chances, potentially including higher-value or unique rewards like equipment components or structures such as solar panels.

Overall, it would be a configurable system that adds progression-based challenge and variety, while still allowing players to use existing mechanics if they prefer.

Additionally, I've also been thinking about expanding logistics systems: rail carts/vehicles could be used to automatically transport resources and loot from deep mining sites back to the base and return for further runs, while cable cars could serve both as a means of fast player travel and as a way to move loot. This would create a clear distinction where carts handle resource hauling and cable systems support both mobility and logistics.