Big, clear online games you can play without signing up, downloading, or pop-ups
A hard sci-fi idle game evolving from the Big Bang to an interstellar civilization
Stage
Not given
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Founded
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Based in
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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
Large print with adjustable text size from 22px base to 35px
High contrast mode for crisp black on white display
Click-to-place controls instead of dragging
No timers in original games
Unlimited hints with explanations
Unlimited undo button to reverse moves
Print-friendly puzzles for pencil and paper
28 original games built for accessibility
No pop-ups or ads covering gameplay
No account or sign-up required
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
Built specifically for accessibility with large print that scales without breaking the layout
No timer, no pressure gameplay designed for seniors to play at their own pace
Completely free with no hidden payments, trials, or premium tiers
Games designed without dragging, using click-then-click controls for easier play
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
Free Games for Seniors
Cosmos Era