Age of Origins Biochemical Lab Guide: Zombie Troops From Your Dead

Part of the Base Building series:

• Intimacy Guide: The Lucy & Saya answers this building's storyline leads to.
• Medici's Treasure Guide: The event your zombie troops were born for.

Quick Answer

• The Biochemical Lab houses three facilities: the Treatment Room (heal Lucy and Saya), the Biochemical Hospital (heal your troops), and the Biochemical Workshop (recruit zombie troops).
• The community-settled opening: give every healing vial to Lucy first until Stage 12 unlocks Intimacy — and with it, Biochemical Technology points.
• Biochemical material comes from your dead troops — a share of every army you lose feeds the Workshop, which turns the game's worst outcome into an input.
• Zombie troops start weak — early on they're a meat shield and a material engine — and become real once the Biochemical Technology tree matures.
• Healed infected can be dispatched on exploration missions up to 3 times a day — free items most players forget exist.

The Darkest Building in the Game

Every other building in your city fights the apocalypse; the Biochemical Lab licenses it. The premise: you rescue two infected survivors — Lucy and Saya — feed the Treatment Room healing vials, and advance their recovery through numbered stages. Along the way the building sprouts its two working wings: a Biochemical Hospital that heals ordinary troops, and the Biochemical Workshop, where the real prize lives — recruiting Biochemical Zombies as a troop class of your own.

The strategic hook is the material economy. Biochemical material is produced from your dead troops — when your armies die attacking or defending, a share of the remains flows to the lab. Read that twice, because it quietly rewrites the game's loss accounting: every kill event disaster, every failed defense, every over-ambitious rally now pays a consolation dividend in Workshop fuel. Veterans push it further with the deliberate "suicide troop" tactic — sacrificing batches of cheap, low-tier troops specifically to farm material. Ghoulish, effective, and exactly the kind of edge that separates players who read patch notes from players who read lore.

The Lucy-First Opening

Vials are scarce, and splitting them between both patients delays everything. The settled play: all vials to Lucy until Stage 12 — the threshold where Intimacy unlocks, and with it the question-and-answer system (correct answers pay bonus points) and Biochemical Technology points, the currency of the zombie tech tree. Saya's turn comes after; the tech unlock is the schedule-setter.

Two habits once healing progresses:

1. Dispatch the infected on explorations — 3 per day. Healed characters can be sent to find extra items; it's a daily-claim most players never open.
2. Work the intimacy loop — dates, gifts, questions — with gifts banked for Alliance Bounty windows, where "Send Gifts to the Infected" is a scoring category.

Zombie Troops: Patience, Then Payoff

Honest expectations: fresh Biochemical Zombies are weak. Their early job is soaking hits and existing — a renewable meat shield in the fights that allow them. The transformation comes from the Biochemical Technology tree, fed by intimacy-earned points, which buffs them toward genuine late-game relevance.

Where they already shine, at any strength:

• Medici's Treasure — zombies auto-heal after every battle in the Monday dungeon, and the Poisonous Monster-Tyrant boss only takes damage from them. No zombie program, no boss kill.
• The Underground Factory weekly — a push-deeper-each-week challenge built around committing zombies (alongside regular troops and machines).
• Titan equipment synergy — Titan gear buffs extend to Biomechanical/Biochemical zombie units, stacking two late-game systems.

The Investment Case

The Biochemical Lab is a classic late-bloomer: months of vials, stages, and intimacy points before the payoff curve bends upward. Sequence it accordingly — after your core army and research foundations, alongside the other long projects — but start it early, because the storyline's clock only runs while you're feeding it. And once the Workshop is live, audit your material flow: if you're fighting regularly, you're already generating fuel; if you're at peace, the Monday dungeon and event discounts (Medici's has sold material at 40% off for gold) top up the tank.

The endgame image is worth the grind: the horde that spent a year trying to eat your city, marching out of it under your flag.