http://www.empiresmod.com/Empires has been receiving some well deserved recognition lately. Steamfriends.com rated Empires the second best Half-Life 2 mod of 2007, and Mod DB's player choice awards for mod of the year rated Empires the third best mod of 2007 of any game
TechTree (very complex)
The gameplay is completly different from hlČ & the most mods you know.
2 teams
2 commanders (1 on each team)
The commanders are able to build buildings (barracks = spawn points, Armory = ammo/Healh, Vehiclefactory = allows you to build tanks (that can be
pimped custumized in many things (armor layout, power, weapons, firemodeŽs ....), Radar for research, towers, walls & more).
Those buildings get builed by the Engys of the team (there are 4 classes; Rifleman, Engys, Grens (AT), scout). The main fight is around ressource nodes that are placed around the map, but you win the battle by killing the enemy commander, usually done by out teching, sabotaging & then destroying the enemy in a epic siege.
The mod also offers;
-A squad system, (move here, do that & so on)
-Bit RPG (at 10, 20, 30 & 40 points a new special skill slots get unlocked) you get points for nearly evrythign from repairing to killing. Around 10 skills to choose from for evry class (more accurate, health boost, cloak for scout, mine defusing for grens & so on).
Get the full install here;
http://www.empiresmod.com/download_client_full.phpand then apply the patch. (1 mb big)
Make sure steam is off when installing & enjoy!