Haegemonia. Not that well-known game, basicially it's space strategy from the creators of Reunion, made in around 2002-2003. I prefer the expansion pack when playing in LAN. Why is it good in LAN? Because of its unique gameplay, you have to see your opponent's face when you sneak in and colonize a planet in their home system and launch attacks from there
, or when you infiltrate the enemy territory and do everything nasty with spies.