ASSIMILATION
DEFEND · EVOLVE · CONSUME

ASSIMILATION

A cyberpunk bio-horror tower defense. Grow a living hive, mutate 22 tower strains through stars, branches and grafts, and hold the line against 20+ apex organisms.

▶ PLAY FREE IN YOUR BROWSER What is ASSIMILATION?

No install. No account. Your hive saves on your device — with optional cloud backup.

Steam — wishlist coming soon iOS / Android — in development Web — playable now

Live right now

Watch the hive at work

Real gameplay: the Command Center, the line under siege, and a battlefield-scale raid organism.

Screenshots

Combat: a full garrison holding the line against a hundred-strong wave
Hold the line — every enemy is a body on a battlefield, not a number on a path.
A Mega Boss raid: a battlefield-scale organism with exposed weak points
Mega raids: battlefield-scale organisms fought through weak-point surgery.
The Command Center home screen with the living world status organism
The Command Center — your hive between runs, alive and growing.

This week in the hive

Latest Devlog

Every cast is a set piece: hero ability cinematics

All thirty hero abilities now stage a procedural performance when they fire — the Cinderwyrm's breath is a dragon sweeping the lane — and the damage lands the exact moment the performance strikes. Here is how we made abilities feel cinematic without a single sprite, and why the delay is honest gameplay.

All devlogs →
Latest Patch

Update

July 19, 2026 · Gameplay, Visuals, Mega Bosses, Bosses

All patch notes →
Featured Tower

Flesh Reactor

Generates biomass; overcharges NEARBY towers (+dmg, +rate).

Tower guide →
Featured Hero

Knell

The bell SLAMS: a massive resonant blast that staggers the pack — and for 6s the whole hive answers, every tower striking +30% harder.

Hero guide →
Today's Daily Run

One seed, worldwide

Every UTC day generates one deterministic run — same biome, same bosses, same modifiers for everyone. Pure skill on the board.

Play today's seed →
This Week's Contracts

Three constraint runs

One Champion Contract board worldwide, rotating weekly — honour all three for a Perfect Week, and chase the exclusive Gilded marquee.

How contracts work →
Up Next

The roadmap

Steam release, new tower strains, deeper prestige, and community events — see what's growing.

Full roadmap →

A tower defense that grows back

22 tower strainsStars, branches, strains and mastery — four evolution layers per tower.
11 heroesLiving weapons with doctrines, equipment, ability forks and ★10 paths.
44+ enemy strainsSwarms, fliers, artillery, summoners, volatiles — every body a real threat.
20 bossesFramework apexes and battlefield-scale Mega raid organisms.
10 biomesEcosystems that warp the rules — permafrost, bone dunes, neural storms.
19 doctrinesExclusive run commitments that reshape the rules — and rank up as you master them.
A living weekDaily seeds, Champion Contracts, quest rings and directives — the hive resets its rituals weekly.
Set-piece castsEvery hero ability is a staged performance — the sky-dragon strafes the lane, and the blow lands with it.
Works while you're awayThe Idle Harvest accrues honestly — a welcome back, never a replacement for play.
DeterministicSame seed, same run, byte for byte — shareable replays and fair dailies.

Every feature in depth →