# A Slower Speed of Light by MIT Game Lab

5 Hacker News commenters recommended A Slower Speed of Light by MIT Game Lab and 1 criticized it, November 2025 to November 2026. It was recommended in 2 of 13 months.

**Verdict:** Free game people call mind-blowing in physics classes and interesting to play. One critic found problems modeling relativistic Doppler timing.

## Why people recommend it

- Mind-blowing in physics classes (1 comments): "Loved that game!! Blew my mind in my 1st year physics classes" ([source](https://news.ycombinator.com/item?id=49637971))
- Interesting to play with (1 comments): "Played around with this one before. Very interesting." ([source](https://news.ycombinator.com/item?id=49638079))
- Great demo video available (1 comments): "There's a great demo video of it as well." ([source](https://news.ycombinator.com/item?id=49637834))

## What people warn about

- Problems modeling relativistic Doppler timing (1 comments): "the issue that I found was with modeling temporal aspects of relativistic doppler" ([source](https://news.ycombinator.com/item?id=49639144))

## Alternatives hackers recommend

- [Hole Punch](https://hackerapproved.com/p/hole-punch.md): 27 recommend
- [Sandboxels](https://hackerapproved.com/p/sandboxels.md): 10 recommend
- [2D Vehicles](https://hackerapproved.com/p/2d-vehicles.md): 6 recommend

## Cite as

Hacker Approved, "A Slower Speed of Light by MIT Game Lab", https://hackerapproved.com/p/a-slower-speed-of-light/ (counts from 1,795,640 Hacker News comments, November 2025 to November 2026).