Poll

Alien Swarm: Reactive Drop

Free top-down tactical co-op

  • PCFree

Alien Swarm: Reactive Drop multiplayer at a glance

How you play

Players2 to 8 online

How many can play?

No split screen: each person plays on their own device.

CrossplayNot needed

Does Alien Swarm: Reactive Drop have crossplay?

It's only on PC, so everyone plays there.

What it costs

Copies neededNo, it's free

Before you start

MicNo

Do you need a mic?

You can play without voice chat.

What is Alien Swarm: Reactive Drop like?

Up to eight marines run top-down missions against alien bugs, each with their own class and with friendly fire always on.

The group picks marines from four classes (officer, special weapons, medic and tech) and works through a co-op campaign or a challenge with modified rules, fighting its way past the enemies to the mission objective. Explosions and bullets hurt your teammates too. There are also player-versus-player modes (Deathmatch, Gun Game, Instagib and Team Deathmatch), and you can play alone with bots on the official maps.

  • Alien Swarm: Reactive Drop screenshot 1
  • Alien Swarm: Reactive Drop screenshot 2
  • Alien Swarm: Reactive Drop screenshot 3
  • Alien Swarm: Reactive Drop screenshot 4

Will your group like it?

Yes

Groups of two to eight who want a free co-op shooter on PC, with classes that complement each other and community-made maps from the Workshop.

No

Anyone who wants console play or same-screen play, since it only exists on PC, and anyone who can't stand friendly fire, which can't be turned off.

If it's not for your group, try these

Info checked on November 2, 2026.