ACE Online is a Korean MMO shooter from MasangSoft in which you do not walk a character around - you fly one. Every player pilots a personal starfighter called a Gear across ground, lunar and space maps, and the fighting happens in full 3D at speed. It reached Western players in 2006 as Space Cowboy Online, ran in Europe as AirRivals from 2008, and took the ACE Online name back in 2016, passing through a long list of regional publishers along the way.

All those changes of name and publisher left players attached to particular eras of the game. Fan-run private servers bring those eras back, usually with faster leveling and a fresh war between the two nations, which is the part of ACE Online that veterans miss most.

Gears, Nations and Mothership Wars

You choose your Gear when you create a character, and it sets your role for good. The B-Gear is the bomber, the I-Gear the interceptor, the M-Gear the support ship with repair and support skills, and the A-Gear the artillery unit. A formation that mixes all four works far better than four of the same, and the Gear you pick shapes how you level, what you farm and where you sit in a fight.

Every pilot also enlists in one of two nations: Bygeniou City United (BCU) or Arlington National Influence (ANI). Nation war is the heart of the game. Shooting down enemy Gears earns your nation contribution points, raids and skirmishes play out over contested and neutral maps, and Strategic Points spawn at random and vanish after an hour if nobody destroys them. The highlight is the Mothership War, when a nation's leader calls the enemy mothership onto the map and both sides throw everything at it. Destroying it gives the attacking nation bonuses and map access, so the result is felt by everyone, not just the pilots who flew.

What to Look For in an ACE Online Private Server

Two nations of similar size

Nation war only works when BCU and ANI are close in numbers. On a lopsided server the smaller nation loses every Mothership War, its pilots drift away, and the bigger side is left with nobody to fight. Look at the activity on both sides before you enlist, and check whether the staff does anything to keep them even.

Which era of the game it runs

Years of official patches changed weapons, armor, maps and the balance between the four Gears. A private server picks one point in that history, and that choice decides which content exists and which Gear comes out on top. A server that says plainly which version it is based on, and what it has changed, is far easier to judge than one that does not.

Leveling pace for every Gear

The M-Gear has a reputation as the slowest Gear to level, because a support ship deals little damage on its own. Rates that feel fine on an I-Gear can be a slog for a healer. Read the EXP and drop rates with your chosen Gear in mind, and ask how support pilots on the server reached the level cap.

War schedule and time zone

Mothership Wars and Strategic Points pull the whole server online at once. A published schedule tells you whether the big fights land in your evening or at four in the morning, and a server whose wars still fill up is a server that is alive.

Cash shop and upgrades

In a PvP game decided by weapons, armor and upgrades, any stat edge that can be bought shows up in the next nation war. Read what the shop sells. Cosmetics and convenience items are one thing; upgrade materials, weapons and stat boosts are another.

Getting Started

Pick your nation by looking at which side needs pilots, then pick a Gear that fits how you like to play - the I-Gear for dogfighting, the A-Gear for heavy firepower, the M-Gear if you want every formation to ask for you. Join a guild early, because nation war is a team game and lone pilots get picked off. Vote for the server you fly on; rankings here start again every month, so the list below shows where pilots are active now.