Multiplayer mode on Fire and Sword. It's basically wave defense. It's great fun, until the cavalry show up and run through your men like butter.
I'll be honest and say I didn't really play multiplayer, I kind of just played the single player, felt disappointed and uninstalled it because I'm running out of hard drive space.
I like the combat in it, I think the guns work really well, but the campaign map and the factions were just so boring (though I did like the Cossacks).