Online co-op Aliens games

Every online co-op Aliens game on Steam we know of, newest first. Add tags or a price band to narrow it down.

Showing 1–10 of 138 games matching Aliens · updated 12 Oct 2026

Filters: Aliens × Clear all
Free
Released
Price
Free
Players
👥 Not stated
Reviews
100% of 1

Free online 2D space combat with PvPvE. Pick a faction, upgrade your ship and take on other pilots and hostile fleets in PvP, wave-based wormholes, bosses, weekly events and clan wars across more than 20 maps.

If you loved these, you'll love this

$$
Released
Price
$$ · Standard
Players
👥 Not stated

Tower defense where the maze is yours to build and the ammunition is yours to manufacture. 16 towers, a factory of belts and assemblers fed by enemy debris, and a card every wave. Reach wave 50 — then find out that Hard was the easy one.

If you loved these, you'll love this

$
Released
Price
$ · Cheap
Players
👥 Not stated

A chaotic co-op space party game where you and your buddies keep a failing ship alive under pressure. Punch, kick, repair, and clear crisis missions—trash storms, oxygen drops, fuel runs, and assaults—before the timer ends.

If you loved these, you'll love this

$
Released
Price
$ · Cheap
Players
👥 Up to 2 players

A neon twin-stick roguelite about descending a flooding tower. Grapple, dash and bullet-time through 30 procedural floors, spend enemy-dropped chips on weapons and upgrades, and fight a multi-phase boss every fifth floor. Seven run types, four difficulties, two-player online co-op.

If you loved these, you'll love this

$
Released
Price
$ · Cheap
Players
👥 1–4 players
Reviews
83% of 85

DIG Raiders is a co-op game about blasting underground in search of aliens. Deep in debt, you've taken on a mysterious dig site. Team up, blow a path below, explore, find aliens, and put them to work in your alien shopping district—or ditch the job and start an all-out brawl with your friends!

If you loved these, you'll love this

$
Released
Price
$ · Cheap
Players
👥 6–8 players

UNLISTED is a 6–8 player social horror game set in a containment facility. Work together to restore critical systems and escape—but stay alert. Something inside can imitate a human, and the person standing next to you may not be who they claim to be.

If you loved these, you'll love this