Grow into the danger.

A guide to the Sunreef, from steering and splitting to the Vault and Daily Dive.

Eat small. Think big.

Touch and drag to steer your golden organism. Absorb smaller cells and collect pellets. Stay clear of larger predators and viruses that can scatter a large cell into vulnerable fragments.

Tap Split to lunge in your movement direction. Splitting gives you reach, but each fragment has less mass until it recombines. A second finger can also trigger a split while you steer.

Each depth moves through Calm, Hunt, Apex, and a brief lull. Watch the Apex’s warning line and move out of its charge. The HUD shows your mass, peak, elapsed time, depth, and next-level progress.

Pause freezes a run. End Run abandons it; Massward does not save a live run for later.

Shape the next dive.

Level up during a run to choose a mutagen. Improve pellet yield, speed, split distance, wards, recombining, or other traits. Choices stack up to each trait’s limit.

Between runs, spend biomass on permanent mutations. Metabolism and Motility are free; Pro adds Combat and Yield. These upgrades strengthen Endless, while Daily starts everyone equally.

Earn shards from completed runs, Apex kills, and deeper dives. Splice Bays add draft choices in Endless, up to five. Favor a gene to guarantee it appears while it remains eligible. Inspect a gene before spending; choosing a different favorite costs shards again.

Return to something earned.

The Vault cultures biomass while you are away, up to its storage cap. Collect it before the tank fills. Cultures add production; organism tiers can increase the rate or capacity. Deep Harvest boosts production for Pro players.

Earned shows lifetime income, Balance is available to spend, and Spent tracks upgrades. Recent deposits show your actual completed runs. Progress stays on this device; signing in links StackForge purchases, not game-save backups.

One ocean. Equal starts.

Daily Dive is always free. Daily Dive starts every player at 10 mass, with no permanent mutations or Splice Lab advantages. Everyone receives the same seeded arena and three seeded draft choices.

Your first Daily dive counts from the moment it begins. End it early and your peak biomass still ranks; replays are practice. A fresh board arrives at 00:00 UTC, and completed days build your streak. Pending results retry when a connection is available; local results remain on your device.

Tap another player on Ranks to block or report a name. Manage blocked players in Me.

Play free. Evolve further.

Daily Dive, Daily rankings, unlimited Endless runs, two mutation branches, and the Idle Vault are free. There are no ads.

Pro adds Combat and Yield mutation branches plus daily Ops with claimable biomass rewards. Choose the one-time Massward Full Game Unlock or StackForge Play Pass. Store-localized prices and terms appear before purchase, with Restore Purchases and subscription management on the paywall.