The Malfunctioned Tek Rex is a carnivore creature in ARK: Survival Ascended.

Melee starts at 100% - solid damage output that scales with level-ups. The Malfunctioned Tek Rex has 1,100 base Health - quite durable. Its base Stamina of 420 gives it respectable staying power. A base Weight of 500 means an enormous weight pool.

The Malfunctioned Tek Rex cannot be tamed and must be dealt with through combat or avoidance. Breeding produces fertilized eggs that hatch within a 32°C–34°C temperature window. Defeating one in the wild grants 30 base XP. It can be cloned at a Cloning Chamber for 0.87 Element plus 0.01 Element per level.

Raising a baby Malfunctioned Tek Rex involves three maturation phases: Baby (0–10%) lasts ~556 min and requires constant hand-feeding. Juvenile (10–50%) spans ~37h - it can eat from a Trough now. Adolescent (50–100%) takes ~46h - continues eating from troughs, nearly fully grown.

Don't skip imprinting - each successful imprint boosts the Malfunctioned Tek Rex's stats, and hitting 100% grants a 30% combat bonus when the imprinter rides it. Imprint requests include cuddling, walks, and specific kibble - check the wiki for which kibble to stockpile.

After a successful mate, the Malfunctioned Tek Rex lays a fertilized egg. Incubation temperature must stay between 32°C and 34°C - use Air Conditioners, Standing Torches, or Dimetrodons to maintain the range. At the correct temperature, the egg hatches in approximately 4 hours and 59 minutes.

After hatching or birth, the baby Malfunctioned Tek Rex matures over an extremely long period, one of the longest in the game, reaching adulthood in about 3 days and 20 hours at 1x maturation. Hand-feeding is required until 10% maturation. After that, a Feeding Trough handles the rest.

Mutations can add +2 levels to any stat and change colors. Stacking mutations across generations is the key to min-maxed breeding lines. Use the breeding calculator to plan food requirements, incubation timers, and maturation phases.

Planning a mass raise? The Malfunctioned Tek Rex raising calculator breaks down food needs per phase so nothing goes to waste. The Baby phase (0–10%) takes ~556 minutes and is the most hands-on, requiring direct feeding or a Maewing.

Raising multiple Malfunctioned Tek Rex simultaneously? Set the dino count and the calculator scales food requirements automatically. Match your food choice to your play schedule - longer spoil timers mean less babysitting.