Alien Swarm: Reactive Drop

store.steampowered.comStore page, read 28 October 2026

Backs Online co-op, Most players online, Free base co-op, Confirmed free setups, Release status, About, Puzzles and figuring out.

• Online co-op: The features list shows Online Co-op, and the text calls the game tactical co-op.
• Most players online: The text says tactical co-op for up to 8 players.
• Free base co-op: The page has a Play Game button and no price. User tags include Free to Play.
• Confirmed free setups: The whole game is free and co-op missions are its main mode. No page lists supported group sizes, so none are given.
• Release status: The page shows 20 Apr, 2017 and no Early Access badge.
• About: User tags include Aliens and Sci-fi. The content notes say the main loop is killing alien bugs.
• Puzzles and figuring out: The text mentions hacking minigames and user tags include Hacking.

store.steampowered.comStore data, read 28 October 2026

Backs Steam app ID, Release status, Release date, Platforms, Free base co-op, Genres, Laughter and chaos, Fighting.

• Release status: coming_soon is false and the genres do not include Early Access.
• Release date: Steam shows Apr 20, 2017.
• Platforms: Steam lists Windows only. It does not list Mac or Linux builds.
• Free base co-op: is_free is true, there is no price, and the genres include Free To Play.
• Genres: Steam lists Action and Free To Play. Wikidata and the maker's wording add the shooter genre.
• Laughter and chaos: The content notes say friendly fire with explosives can make marines burst apart in cartoon gibs.
• Fighting: The content notes say the main loop is using weapons to kill alien bugs.

store.steampowered.comStore data, read 28 October 2026

Backs Steam Deck.

• Steam Deck: Valve rates the game Unsupported on Steam Deck.

reactivedrop.comOfficial site, read 28 October 2026

Backs Online co-op, Most players online, Free base co-op, Confirmed free setups, Genres, Kind of game, About, Working in sync, Rivalry in the group, Fighting, Unlocks and progress, Planning ahead.

• Online co-op: Says you play with other marines against hordes of aliens to finish objectives.
• Most players online: The key features say tactical co-op for up to 8 players. A review page elsewhere claims 32 players, which the maker does not state, so 8 is used.
• Free base co-op: Calls the game free and open source.
• Confirmed free setups: Co-op missions are the main way to play, and the page offers the game for free.
• Genres: Calls the game a cooperative top down shooter.
• Kind of game: Four classes of two characters each play together against hordes of aliens.
• About: The page lists diverse aliens to fight.
• Working in sync: Four classes, with some weapons restricted to a class.
• Rivalry in the group: Lists PvP modes and leaderboards for the fastest mission completion. Both are side modes.
• Fighting: Says marines face hordes of aliens in every mission.
• Unlocks and progress: Says you earn experience to unlock persistent items, with over 40 weapons and equipment.
• Planning ahead: Lists over 40 weapons and equipment with countless loadout setups.

reactivedrop.comOfficial site, read 28 October 2026

Backs Free base co-op, Confirmed free setups.

• Free base co-op: Says there are no microtransactions and everything in the game is free and open source.
• Confirmed free setups: The same statement covers the co-op missions, so no purchase is needed to play them.

reactivedrop.comOfficial news, read 28 October 2026

Backs Release status, Release date.

• Release status: The post of 2026-04-20 shows the game still gets updates.
• Release date: The post marks the game's birthday on 20 April, which matches the Steam date.

wikidata.orgWikidata, read 28 October 2026

Backs Wikidata item, Genres, Release date.

• Genres: Property P136 lists action game and shooter game.
• Release date: P577 is 2017-04-20 for Windows on Steam.

gamerant.comPress, read 28 October 2026

Backs Kind of game, Sessions, Working in sync.

• Kind of game: List entry updated 2026-10-11 presents the game as co-op first for large groups.
• Sessions: Entry says the game has more than 10 campaigns of a few missions each.
• Working in sync: Entry says players need to work together to survive.

games-genie.comPress, read 28 October 2026

Backs Kind of game, Sessions, Tension and danger, Working in sync, Puzzles and figuring out, Time to hang out, Getting better, Unlocks and progress, Planning ahead.

• Kind of game: Review of 2026-10-21 describes squad play with set roles, such as a medic keeping the team up while others hold a door.
• Sessions: Review says most missions finish in 20 to 30 minutes.
• Tension and danger: Review says the top-down view never removes tension and recklessness is punished.
• Working in sync: Review says communication matters more than raw aim and no class feels optional on higher difficulties.
• Puzzles and figuring out: Review mentions a tech cracking a terminal and a door being welded during a mission.
• Time to hang out: Review says communication drives the missions, so talk stays on the task.
• Getting better: Review says low difficulties are generous and Brutal ramps hard.
• Unlocks and progress: Review says levels unlock weapons and gear across eight characters.
• Planning ahead: Review says harder modes demand loadout planning and ammo care.