There's an old DOS game called Battle Isle 2200 that I played a bunch of back in the day (It was discussed back on the old Turbo Mailing List). I found it at some computer shop in a bargain bin ages ago and played it a ton, but haven't tried getting it running on a modern computer.
A quick google search found this:
http://www.dosgamesarchive.com/download/battle-isle-2200/It looks like it'll run using Dosbox so I may have to give it another go.
EDIT: D'oh! Upon further investigation, the link above is only for a demo. It still might be worth checking out, but I don't know how easy it would be to hunt down a full version.