Empires, the award winning Half-Life 2 mod, combines the best of the first person shooter and real-time strategy genres. Fight as either the Northern Faction, remnants of the fallen nation of Jekotia, or as the imperial Brenodi Empire. Empires features:
You need to fix the texture alignment in this area - the thing in the bottom-left corner has its blocks unaligned, and the corner facing us of the building above it isn't aligned with the windows to its sides.
Apart from that, I really like it.