MegaMek

MegaMek is an unofficial, online version of the Classic BattleTech board game. MegaMek is open source, free software. It is licenced under the GPL.

Features include:
* Network or hotseat play for 2 or more players
* A somewhat cunning AI opponent for offline play
* Choice of ground, atmosphere, or space combat, using Total Warfare rules
* Integration of ground and atmospheric combat using the "Aerospace Units on Ground Mapsheets" rule.
* Many of the optional rules and technology from Tactical Operations, including advanced terrain and planetary conditions
* Map board selection and editing
* Map boards based off official map packs included
* Mech selection and support for some mech editors
* Most official mech designs
* Color graphics