bzflag

Install command: 
brew install --cask bzflag

Name: BZFlag

3D multi-player tank battle game

https://www.bzflag.org/

Cask JSON API: /api/cask/bzflag.json

Cask code: bzflag.rb on GitHub

Current version: 2.4.30

Current version requires: macOS >= 10.13

Analytics:

Installs (30 days)
bzflag 7
Installs (90 days)
bzflag 25
Installs (365 days)
bzflag 83
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