EVOSIM
EVOSIM
natural selection engine · v3.0

Watch evolution unfold in real time. Prey carry a genome that determines survival. Creatures eat, reproduce with mutations, and adapt to their environment. Predators also evolve. Switch biomes mid-simulation to apply new selective pressures. Click any creature to inspect its genome.

PREY GENOME

SPEED — escape vs. energy cost
SIZE — unlocks mushrooms, more drain
STEALTH — reduces predator vision
VISION — spot food & threats early

PREDATOR GENOME

SPEED — chase velocity
VISION — detection range
AGGRESSION — attack radius
Starve if prey collapses

FOOD TYPES & BIOME ENVIRONMENTS
Plant — 20e · all prey
Fruit — 40e · all prey
Mushroom — 65e · size≥7
Insect — 85e · speed≥2.8

Biomes apply real-time modifiers: energy drain, food richness, speed/stealth/vision bonuses or penalties unique to each environment.

Initial Prey35
Initial Predators3
Food Density45
Mutation Rate0.08
SNAP 0 PREY PRED B 0 D 0
// ANALYTICS
POPULATION
PREY
0
PREDATORS
0
SNAPSHOT
0
FOOD
0
SPECIES CENSUS
PREY MORPHS
PREDATOR MORPHS
POPULATION HISTORY
Prey
Pred
PREY TRAITS
Spd
Sz
Sth
Vis
PREDATOR TRAITS
Spd
Vis
Agg
PREY AVERAGES
PREDATOR AVERAGES
DIVERSITY (σ)
EVENT LOG
🧫

PREY
PRED
BIRTHS
DEATHS
TIME