Beginner Guide — Your First Runs

The loop in one paragraph

ASSIMILATION is a tower defense where you ARE the thing growing. Enemies march from the breeding membrane at the top of the arena toward your Hive Core at the bottom. Kills drop Biomass — this run’s fuel — which you spend on towers, upgrades and heroes. Between waves you draft Gene Cards that bend the run’s rules. If the Core’s integrity reaches zero, the run ends; everything you learned, unlocked and mastered persists into the next one.

Your first three towers

Open with a Needle Spitter near the center of the line — long range, cheap, reliable single-target damage. Add a second tower one wave later: splash for swarms or a support organ to feed the line. The most common beginner mistake is saving Biomass "for later" — an unspent bank kills nothing. Spend early, spend central.

Place towers where their range circles overlap the approach lanes, not at the map edge. A tower that fires for eight seconds per wave is worth two that fire for three.

Waves, drafting and your hero

After every cleared wave the run offers a Gene Card draft: a temporary boost for THIS run whose card also joins your permanent Gene Archive for leveling. Never skip a draft. Your hero fights on their own, but their Active Ability is yours — save it for the moment a wave slips past the towers, not the moment it spawns.

Your first hour

The tutorial teaches the real loop over two waves — wave, draft, build, wave — and ends with one graduation reward. Your first trips back to the Command Center are walked step by step: you open the menus, buy your first upgrade and crack your first container yourself, and the board only shows what you have been shown. From there the hive opens up as you clear Campaign stages: Infinite after Stage 3, the Daily Run after Stage 5, Boss Rush after Stage 12, and the labs, market and side wings a step or two at a time in between. After each run you learn at most two new systems, each with its own card (and a short guided tour when it opens a new screen); controls you use mid-fight, like Early Call and game speed, show a one-line field note the first time they matter. Everything you have unlocked is in Help, and the Command Center always names what comes next.

If a stage beats you, read the Results screen before you retry: it tells you how close you came, what got through and one thing to change. Replaying a stage you have already cleared is never wasted — it pays progression, and it is where Hive Intelligence can take the routine purchases off your hands.

The five run-enders

1. Hoarding Biomass. Towers you didn’t build deal no damage. 2. Ignoring fliers. Check the wave preview; airborne strains ignore ground obstacles. 3. One damage type. Armored waves shrug off chip damage — layer classes. 4. Wasting the hero ability. It is your emergency brake. 5. Quitting after a loss. Every run pays permanent progression — a lost run is still fuel.