Runaway Strain

Runaway Strain is a biological survival game where you grow a colony while fighting an escalating mutation outbreak.

Absorb green nutrients to gain energy, then split to create autonomous cells that feed and reproduce. Black mutagen transforms regular cells into hostile mutants that hunt, consume, and multiply from your colony.

Your stun pulse has two effects:

• Mutants caught in the pulse are stunned and can be absorbed for biomass.
• Regular cells caught in the pulse become golden sentries for three seconds. Sentries rapidly hunt and consume non-stunned mutants, but leave stunned targets available for you.

Reach 150 biomass before time expires. If mutated cells outnumber regular cells, the colony is overwhelmed.

Controls:

• Move — WASD, Arrow Keys, or Left Stick
• Split — Spacebar or Gamepad South Button
• Stun Pulse — E, Right Mouse Button, or Gamepad West Button
• Start — Enter, Spacebar, Start Button, or Gamepad South Button
• Restart — R or Enter

Tips:

• Continue gathering nutrients to power splitting and stun pulses.
• Pulse near groups of friendly cells to create a temporary sentry squad.
• Stun nearby mutants for personal absorption while sentries attack active threats farther away.
• You can absorb up to three stunned mutants simultaneously.
• Follow the screen-edge pointers toward nutrients and mutants.
• The outbreak warning appears when mutants reach half the regular population.
• Mutant attacks temporarily increase nutrient spawning, giving a struggling colony a chance to recover.