New to PBM games

[Davin]

Do I have to have a Windows machine for Galac-Tac? All I have right now is Android.

Galac-Tac is a purely text/HTML game based on the printed reports back in the old PBM days.  You can type in actions on the web site and also view the reports that way, so all you need is a browser (and even very old ones will work).  However, most people use additional playing aids, such as Excel spreadsheets.  My favorite aid is the GTac Assistant, which is a Windows-based program.  But a number of players are also running the GTac Assistant successfully on Macs using the Crossover software.

So what additional tools you have available are up to you, but the game itself just needs any old browser.  Keep in mind that the reports are designed for paper printing and thus phone screens are often too small to be readable in full-page mode.