Combat Online

Combat Online is a first-person shooter that runs straight out of a browser tab. There is no launcher, no download and no account: the game boots on Unity WebGL, drops you on a server list, and puts you in a team deathmatch within a few seconds of picking a region.

It is also unusually close to a desktop shooter for something that lives on a web page. Free mouse look, sprinting, jumping, a nine-slot weapon wheel on the number keys, and a live scoreboard that counts every kill on the server.

What a match of Combat Online actually is

Two squads share one compact arena and one scoreboard. Every elimination moves your team's number up, and whichever side is ahead when the round closes takes the match. There is no respawn timer worth worrying about and no round-long elimination, so the pressure never really lifts — you die, you come back, you are back in the fight before the body you left has finished falling.

Everyone starts each life on the same basic loadout: a knife and a sidearm. Everything heavier — shotguns, SMGs, rifles, the bolt-action sniper — has to be chosen deliberately from the weapon slots, which means the first few seconds of a life are about deciding where you are going rather than what you are holding.

The weapon ladder, and why it matters more than aim

The arsenal is arranged by distance rather than by rarity. A sniper rifle is not "better" than a shotgun; it is better on a rooftop looking down an open lane, and close to useless when someone turns a corner two metres away.

• Knife: silent and instant at contact range. Worth going for on a player who is scoped in and has stopped paying attention to their flanks.
• Sidearms: what you spawn with. Accurate enough at short and mid range to win the walk back to a better gun.
• Shotguns: they delete anything inside a doorway. Outside that doorway they are noise.
• SMGs: the all-purpose pick for interiors, forgiving while moving.
• Assault rifles: the default answer on mid-range lanes where you need both control and volume of fire.
• Bolt-action sniper: one shot per cycle, and the only weapon that owns a long sightline. Miss and you have to reposition.

Because switching is a number key rather than a menu, you can change the answer mid-fight instead of dying with the wrong one.

How to play Combat Online

• Move with WASD or the arrow keys.
• Aim with the mouse; left click fires.
• Space jumps, Shift sprints.
• 1 to 9 swap weapons.
• Tab opens the scoreboard.

That last key is the one most new players ignore. The scoreboard is not decoration: it tells you which enemy is carrying their team, how many deaths your own squad is bleeding, and whether the round is close enough to justify holding an angle instead of pushing. Reading it between lives costs nothing and changes where you should be standing.

Sprinting is a commitment

You cannot shoot while repositioning, so sprinting across an open courtyard is a decision to be unarmed for the length of that courtyard. Use it between pieces of cover, not through a sightline. The players who look like they are teleporting around the map are almost always sprinting only when nobody can see them.

Elevation is the cheapest advantage in the game

Rooftops and upper floors narrow the angle an enemy can return fire from, and they make your own shots easier to line up. Climbing costs a few seconds; holding the high ground for a whole life is usually worth far more than the alternative of contesting the same corridor at eye level.

Map layout: rooftops, courtyards, corridors

The arenas are deliberately small, stitched together from three kinds of space. Open rooftops reward the sniper and punish anyone who crosses them in a straight line. Courtyards are the middle ground where rifles work and where most trades happen. Indoor corridors are where shotguns and SMGs take over, and where a single player holding a doorway can stop a push.

Learning two or three routes through each map is enough to stop dying to the same angle twice. The maps are small enough that this takes a handful of lives, not an evening.

Which server should you join

The game runs public servers in North America and Germany. Pick whichever is closer to you: the weapon tuning and the map sizes are identical, so the only variable you are choosing is latency, and in a shooter where duels are decided in fractions of a second, latency is the variable that matters most.

The player count on each server is visible before you join, so you can tell whether you are dropping into a full match or an empty arena.

Is Combat Online playable in a browser?

Yes, with one caveat. It is a keyboard-and-mouse game — free look, number-key weapon swaps, sprint — so it belongs on a desktop or laptop. Touch controls do not exist, and the Unity WebGL build expects a real pointer. On a modest laptop it runs fine; the build is a few megabytes and starts in seconds.

If you want more shooters that open in a tab without an install, the rest of the shooting games on cool games spot work the same way.

Frequently asked questions

Is Combat Online free?

Yes. There is no purchase, no download and no sign-up. Open the page, pick a server region, and you are in a match.

What are the controls?

WASD or arrow keys to move, mouse to aim, left click to shoot, Space to jump, Shift to sprint, the 1-9 keys to switch weapons, and Tab for the scoreboard.

Can I play with friends?

Yes, as long as you join the same region and the same server. Once you are in, the Tab scoreboard lists both squads, so you can see where your friends are on the scoreline.

Why do I only have a knife and a pistol when I spawn?

Every life starts on the basic loadout. The heavier weapons are selected from the number keys during the life, so early positioning and pistol accuracy are what decide the first exchange.

Does it work on a phone or tablet?

Not really. The game needs a keyboard for movement and weapon switching and a mouse for aiming, so it is a desktop experience. Trying it on a touchscreen gives you a camera you cannot control properly.

Are there different maps?

Yes. The rotation mixes compact arenas built from rooftops, courtyards and indoor corridors, and each one favours a different range bracket, which is why the weapon you carry should change with the map.