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Games like Alien Swarm: Reactive Drop | IndieDex

Alien Swarm: Reactive Drop
Games like Alien Swarm: Reactive Drop

Games like Alien Swarm: Reactive Drop

A free co-op top-down shooter focused on squad tactics and alien-bug hunts, with online/LAN play and community content.

Alien Swarm
A free-to-play top-down shooter with solo and four-player co-op, featuring alien hordes, mission-based combat, and a level editor, with a short campaign that reviewers typically complete in a couple of hours.
2010-07-19
- Shooter
- Action

Warfare

Science fiction

Bird view / Isometric

CS2D cover art

CS2D

A free fast-paced top-down 2D multiplayer shooter with varied modes, a map editor, and short casual play sessions.

2017-11-15

Shooter
Action
Bird view / Isometric
Tactical

Slipstream: Rogue Space cover art

Slipstream: Rogue Space

A free-to-play space roguelike where players team up to fight aliens in chaotic, cute-animal-filled co-op sessions that scale from small groups to large streamer crews.

2024-02-12

Action
Science fiction
Strategy
Tactical
Indie
Side view
Simulator
Real Time Strategy (RTS)
Role-playing (RPG)
Point-and-click

SAS: Zombie Assault 4 cover art

SAS: Zombie Assault 4

A free-to-play zombie action-RPG shooter with upgradeable gear, class skills, and solo/co-op/PvP modes, offering both short sessions and deep progression.

2017-10-16

Shooter
Action
Bird view / Isometric
Role-playing (RPG)

Delivery & Beyond cover art

Delivery & Beyond

A chaotic online co-op action-roguelike for up to five players (or 15) centered on breaking in, scrapping everything, and completing deliveries—short, party-style play that reviewers call fun with friends but sometimes tedious.

2026-01-27

Action
First person
Comedy
Science fiction
Adventure
Survival
Strategy
Indie
Business

Retro Commander cover art

Retro Commander

A polished post-apocalyptic RTS with PvP, co-op, and cross-play, offering around 17 hours of gameplay per reviewer reports.

2023-11-24

Science fiction
Strategy
Bird view / Isometric
Indie
Real Time Strategy (RTS)

Brotato cover art

Brotato

A chaotic top-down roguelite where a potato wields up to six weapons, builds unique loadouts, and battles alien hordes, with co-op and a median reviewer playtime around 34 hours.

2023-06-23

Shooter
Action
Science fiction
Survival
Bird view / Isometric
Fighting
Indie
Role-playing (RPG)
Arcade

HYPERCHARGE: Unboxed cover art

HYPERCHARGE: Unboxed

A playful action-figure shooter with co-op Hypercore defense and PvP modes, praised as a fun, casual-friendly game that accommodates varied playtimes.

2020-04-27

Shooter
Action
First person
Platform
Adventure
Strategy
Third person
Indie
Kids
Party

X-MODE cover art

X-MODE

A free-to-play indie FPS with casual online and LAN PvP, a variety of quick game modes, and Very Positive Steam reviews.

2025-09-19

Shooter
Action
First person
Indie

Red Solstice 2: Survivors cover art

Red Solstice 2: Survivors

A real-time tactical strategy/RPG with strategy-layer planning, squad-based online co-op, and long, progression-heavy battles against alien and zombie hordes, occasionally marred by bugs.

2021-06-17

Action
Adventure
Strategy
Third person
Tactical
Indie
Simulator
Real Time Strategy (RTS)
Role-playing (RPG)

Aliens: Fireteam Elite cover art

Aliens: Fireteam Elite

A cooperative third-person horde shooter in the Alien universe with character progression, offering a challenging ~9-hour campaign that franchise fans will enjoy.

2021-08-23

Shooter
Action
Science fiction
Horror
Survival
Third person

Alien Arena: Warriors Of Mars cover art

Alien Arena: Warriors Of Mars

A free-to-play arena FPS with CTF, tactical, and free-for-all modes, mutators, and cross-play, offering fast-paced PvP and co-op in short sessions.

2017-11-03

Action
Indie