# Xenos - Stage 4 (technology) internal name `xeno-mk04` · tier 9 (Utility science pack, [tier 9](https://factorio.kalzumeus.com/tier/9.md)) HTML page: https://factorio.kalzumeus.com/tech/xeno-mk04/ ## Cost 3300 units of (1 × [Utility science pack](https://factorio.kalzumeus.com/item/utility-science-pack.md), 2 × [pY science pack 4](https://factorio.kalzumeus.com/item/py-science-pack-4.md), 3 × [Production science pack](https://factorio.kalzumeus.com/item/production-science-pack.md), 6 × [pY science pack 3](https://factorio.kalzumeus.com/item/py-science-pack-3.md), 10 × [Chemical science pack](https://factorio.kalzumeus.com/item/chemical-science-pack.md), 20 × [pY science pack 2](https://factorio.kalzumeus.com/item/py-science-pack-2.md), 30 × [Logistic science pack](https://factorio.kalzumeus.com/item/logistic-science-pack.md), 60 × [pY science pack 1](https://factorio.kalzumeus.com/item/py-science-pack-1.md), 100 × [Automation science pack](https://factorio.kalzumeus.com/item/automation-science-pack.md), 20 × [Military science pack](https://factorio.kalzumeus.com/item/military-science-pack.md)), 600 s each. ## Requires (3) - [Petroleum gas processing - Stage 2](https://factorio.kalzumeus.com/tech/petroleum-gas-mk02.md) - [Utility science pack](https://factorio.kalzumeus.com/tech/utility-science-pack.md) - [Xenos - Stage 3](https://factorio.kalzumeus.com/tech/xeno-mk03.md) ## Leads to (0) - none ## Unlocks (5 recipes) ### Caged xeno (`caged-xeno-4`) - 70 s · tier 9 · productivity modules allowed - Ingredients: 4 × [Xeno egg](https://factorio.kalzumeus.com/item/xeno-egg.md), 2 × [Caged mukmoux](https://factorio.kalzumeus.com/item/caged-mukmoux.md), 10 × [Bones](https://factorio.kalzumeus.com/item/bones.md), 6 × [Water barrel](https://factorio.kalzumeus.com/item/water-barrel.md), 16 × [Fish](https://factorio.kalzumeus.com/item/fish.md), 10 × [Guts](https://factorio.kalzumeus.com/item/guts.md), 1 × [Caged ulric](https://factorio.kalzumeus.com/item/caged-ulric.md), 1 × [Cage](https://factorio.kalzumeus.com/item/cage.md) - Results: 6 × [Empty barrel](https://factorio.kalzumeus.com/item/barrel.md), 4 × [Caged xeno](https://factorio.kalzumeus.com/item/caged-xeno.md) - Made in: Xeno pen MK 01, Xeno pen MK 02, Xeno pen MK 03, Xeno pen MK 04 - Unlocked by: [Xenos - Stage 4](https://factorio.kalzumeus.com/tech/xeno-mk04.md) ### Xeno AI system kit (`compile-xeno-ai`) - 30 s · tier 9 - Ingredients: 1 × [Xeno integrated module](https://factorio.kalzumeus.com/item/xeno-codex-mk03.md), 1 × [Control unit](https://factorio.kalzumeus.com/item/control-unit.md) - Results: 1 × [Xeno AI system kit](https://factorio.kalzumeus.com/item/xeno-codex-mk04.md) - Made in: Data array - Unlocked by: [Xenos - Stage 4](https://factorio.kalzumeus.com/tech/xeno-mk04.md) ### Xeno egg (`xeno-egg-4`) - 20 s · tier 9 · productivity modules allowed - Ingredients: 1 × [Xeno](https://factorio.kalzumeus.com/item/xeno.md), 2 × [Caged mukmoux](https://factorio.kalzumeus.com/item/caged-mukmoux.md), 25 × [Fish](https://factorio.kalzumeus.com/item/fish.md), 20 × [Bones](https://factorio.kalzumeus.com/item/bones.md), 15 × [Water barrel](https://factorio.kalzumeus.com/item/water-barrel.md), 20 × [Guts](https://factorio.kalzumeus.com/item/guts.md), 2 × [Caged ulric](https://factorio.kalzumeus.com/item/caged-ulric.md) - Results: 15 × [Empty barrel](https://factorio.kalzumeus.com/item/barrel.md), 12 × [Xeno egg](https://factorio.kalzumeus.com/item/xeno-egg.md), 4 × [Cage](https://factorio.kalzumeus.com/item/cage.md) - Made in: Reproductive complex MK 01, Reproductive complex MK 02, Reproductive complex MK 03, Reproductive complex MK 04 - Unlocked by: [Xenos - Stage 4](https://factorio.kalzumeus.com/tech/xeno-mk04.md) ### Phase 4 xeno breeding program (`xeno-mk04`) - 30 s · tier 9 - Ingredients: 2 × [Xeno](https://factorio.kalzumeus.com/item/xeno.md), 1 × [Zinc finger fusion proteins](https://factorio.kalzumeus.com/item/zinc-finger-proteins.md), 1 × [Caged mukmoux](https://factorio.kalzumeus.com/item/caged-mukmoux.md), 4 × [Bedding](https://factorio.kalzumeus.com/item/bedding.md), 10 × [Bones](https://factorio.kalzumeus.com/item/bones.md), 10 × [Fish](https://factorio.kalzumeus.com/item/fish.md), 6 × [Water barrel](https://factorio.kalzumeus.com/item/water-barrel.md) - Results: 0.003 × [Xeno MK 04](https://factorio.kalzumeus.com/item/xeno-mk04.md) (0.3% chance), 6 × [Empty barrel](https://factorio.kalzumeus.com/item/barrel.md), 0.7 × [Xeno](https://factorio.kalzumeus.com/item/xeno.md) (70% chance), 1 × [Cage](https://factorio.kalzumeus.com/item/cage.md) - Made in: Reproductive complex MK 01, Reproductive complex MK 02, Reproductive complex MK 03, Reproductive complex MK 04 - Unlocked by: [Xenos - Stage 4](https://factorio.kalzumeus.com/tech/xeno-mk04.md) ### Xeno MK 04 (`xeno-mk04r`) - 200 s · tier 9 - Ingredients: 4 × [Xeno MK 04](https://factorio.kalzumeus.com/item/xeno-mk04.md), 1 × [Xeno AI system kit](https://factorio.kalzumeus.com/item/xeno-codex-mk04.md), 2 × [cDNA](https://factorio.kalzumeus.com/item/cdna.md), 8 × [Bioscaffold](https://factorio.kalzumeus.com/item/bio-scafold.md), 1 × [Nanochondria](https://factorio.kalzumeus.com/item/nanochondria.md), 1 × [RecA protein](https://factorio.kalzumeus.com/item/reca.md), 1 × [Immunosuppressants](https://factorio.kalzumeus.com/item/immunosupressants.md), 100 × [Pluripotent stem cells](https://factorio.kalzumeus.com/fluid/psc.md), 250 × [Sulfuric acid](https://factorio.kalzumeus.com/fluid/sulfuric-acid.md), 200 × [Rich gas](https://factorio.kalzumeus.com/fluid/rich-gas.md) - Results: 5 × [Xeno MK 04](https://factorio.kalzumeus.com/item/xeno-mk04.md) - Made in: Bioprinter MK 01, Bioprinter MK 02, Bioprinter MK 03, Bioprinter MK 04 - Unlocked by: [Xenos - Stage 4](https://factorio.kalzumeus.com/tech/xeno-mk04.md)