WhatIf Lab
Imagine. Decide. Discover.
Run original branching thought experiments, balance resources, explore consequences and distinguish scientific assumptions from creative speculation.
Choose your experience.
Pick any game, read its instructions and start playing immediately.
Two Moons Earth
Plan settlements under an imagined second moon.
Half Gravity World
Design a city with half of Earth’s gravity.
Underwater Civilizations
Choose how a submerged settlement survives.
Mars Colony Builder
Balance a first Martian outpost.
Plastic-Free Civilization
Rethink materials across a growing society.
Global Electricity Blackout
Respond to an extended fictional power outage.
Animals Can Talk
Negotiate a world with speaking animals.
Floating Cities
Make difficult choices for airborne cities.
The Time Loop
Break a repeating day with careful decisions.
The Next 100 Years
Chart a speculative future for humanity.
Latest Playwexa challenges
Thirty independent browser game mechanics across six development batches, with scoring and unlimited replay.
How to begin in WhatIf Lab
Identify what each fictional scenario assumes, then compare two decisions to see which trade-offs change. These simulations are not guaranteed predictions.
Play tips and related reading
Do I need to finish games in order?
No. All published games can be opened directly and replayed without a daily quota.
Where is my progress stored?
It stays in this browser. Use the Explorer Dashboard to create a backup before changing devices.