ASSIMILATION
DEFEND · EVOLVE · CONSUME

ASSIMILATION

A cyberpunk bio-horror tower defense. Grow a living hive, mutate 25 tower strains through stars, branches and grafts, fight across 13 shifting battlefields, and hold the line against 20+ apex organisms.

▶ PLAY FREE IN YOUR BROWSER What is ASSIMILATION?

No install. No account. Plays on desktop and phone — your hive saves on your device, with optional cloud backup.

Steam — wishlist coming soon iOS / Android — in development Web — desktop & phone, playable now

Live right now

Watch the hive at work

Real gameplay: the Command Center, The Coil under a heavy wave, and MERIDIA — a battlefield-scale raid organism.

Screenshots

Combat on The Coil, a maze battlefield: a swarm pours in from the spawn line toward a full garrison
The Coil — one of 13 battlefields. Every enemy is a body on the field, not a number on a path.
A Mega Boss raid: MERIDIA, the Hollow Choir, reaching its tendrils toward the defensive line under beam fire
Mega raids: MERIDIA, the Hollow Choir — battlefield-scale organisms fought through weak-point surgery.
The Command Center home screen: the live event, the command strip and the next campaign stage
The Command Center — your hive between runs, always pointing at the next step.

This week in the hive

Latest Devlog

Your first steps, walked with you

Coming back to base after your first fights used to mean a screen full of panels, cards and pop-ups. Now the game walks you through it one button at a time: you open the menus, buy your first upgrade and crack your first container yourself. Plus Early Call drafts that arrive on time, a fix for Best Move, and a lighter battlefield.

All devlogs →
Latest Patch

First Steps, Walked With You

November 6, 2026 · UX, Gameplay, Bug Fixes, Performance

All patch notes →
Featured Tower

Drake Roost

Incubates a brood of biomech drakes — hunting units that leash to the roost, retreat to mend, and dive back in.

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

New tower strains and heroes, more battlefields and Threat rungs, a Steam edition and native mobile — see what's growing.

Full roadmap →

A tower defense that grows back

25 tower strainsStars, branches, strains and mastery — four evolution layers per tower.
12 heroesLiving weapons with doctrines, equipment, ability forks and ★10 paths.
50+ 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.
13 battlefieldsChokepoints, split lanes, mazes and flank funnels — the map changes how a build plays.
31 rule genesDraft cards that change the rules, not just the numbers — reactions, placement, stances, risk.
The Threat ladder10 named rungs above every mode you've beaten — titles and frames, never Power.
Live PvPArena siege races with ranked divisions — two hives, one seed, first Core down loses.
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 →