Free online games that work at school, office, or anywhere with internet restrictions
A hard sci-fi idle game evolving from the Big Bang to an interstellar civilization
Stage
Not given
Not given
Founded
Not given
Not given
Based in
Not given
Not given
Pricing model
Free
Freemium
Pricing
Not given
Free with no ads; optional Supporter: $2.99/mo, $19.99/yr, or $29.99 lifetime; time crystal packs: $1.99 (Skip a night), $4.99 (Skip a wall), $9.99 (Skip a week)
Key features
Hundreds of free games accessible in restricted networks
No downloads required - browser-based gameplay
Works on all devices including desktop and mobile
Multiple game categories from action to puzzles to sports
2-player multiplayer games
Regular updates with new games
Educational games for learning
Optimized for school networks
13.8 billion year cosmic timeline from Big Bang to interstellar civilization
118 sourced research cards with scientific citations
12 game eras spanning Cosmos, Life and Civilization
16 different endings
12 civilization channels inspired by science fiction and real concepts
Playable on phone, desktop and iPad with cloud save sync
Installable on phone home screen for offline play
No ads and completely free to play
1,400+ nodes each grounded in real science with sources
Physics-accurate simulation where 1 light-year equals 1 real hour
What makes it different
Games work on restricted school and office networks
No account creation or registration required
Age-appropriate content vetted for school safety
Instant play without installation or loading delays
Every scientific claim cites real sources with year, researcher and publication
Hard sci-fi design where physics and signal times follow real scientific laws
Completely free with no ads, payment optional and never pay-to-win
Invented game lore clearly separated and labeled apart from real science basis
Curated collection of 24+ open-source astronomy, physics and biology projects
Games Unblocked
Cosmos Era