Alien Swarm

Alien Swarm

BANGER · Shooter · 2010

Steam Deck Playable

The verdict

PLAY IT.

A BANGER, and it costs nothing.

PriceS
Free to play
ReviewsS
95% of 21,658
Critics
77 players 18 higher
Genre rank
Top 1% Shooter

Time and effort

Main story
3.5h
To 100%
20.9h 6.0x the story
Finish
29% reach the ending
Achievements
66

Players and genre

Online
18 now
Better reviewed
96% of its genre
Price and player charts

The drop-off

56% start to 29% finish
050100rarestfirst achievement

Steam counts a larger share of its players at the ending achievement than it does for most games this site can measure. Steam global achievements

The value story

The value story

Its score puts it in the top 1 percent of the games it competes with. It is better reviewed than 96 percent of its genre. Among the games closest to it, SAS: Zombie Assault 4 (free, scores 61) and Counter-Strike Nexon (scores 17) both come in lower.

It is still busy. 18 players were online when we last checked, on Nov 5, 02:46 UTC, across 35 days of weekly checks.

More about Alien Swarm

The press gave it 77; the people who bought it give it 95 percent. An 18-point gap in the buyer's favour.

Steam's global achievement data puts 29 percent of players at this game's ending achievement. The median game this site can measure sits at 18.

The main story runs 3.5 hours. Doing everything runs 21, 6.0 times as long.

Buy now or wait

What drives the score

Grades: S best, D weakest

S is the best grade and D the weakest, judged as a buyer. ▲ raises the score, ▼ lowers it, ? is an input we do not have, • is a fact this genre's score does not use. How the grades work

Raising the score
Cost per hourFree
Price per hour of game. It moves the score inside the ceiling reviews set
Reviews
Gates the score. Weak reviews cap it, and nothing reaches BANGER without strong ones
Reach3.5M+ owners
How many own it, by SteamSpy's estimate (an old snapshot). A free game has no price to weigh, so this is its value read
Engagement29% finish
How far players get (achievements). It can only add points
MonetizationNone
Checked: no in-game purchases or loot boxes. That earns a small credit unless Steam lists in-app purchases
For context
RefundsFree
A free game cannot be refunded, so the label never applies
AI contentNone disclosed
From the developer's own Steam disclosure. No disclosure is not proof of none, so it does not move the score

About the game

Co-operative multiplayer game and complete code base available for free.
Description from the Steam store page.
Minimum specs

Minimum on the Steam store: 1 GB of memory, 2.5 GB of storage. Windows only.

Cite this score

BANG Score badge
Alien Swarm scores 92/100 on the BANG Score (a BANGER) as of Nov 8, 2026. The BANG Score rates what a game is worth for the money. Via Steam BANGERS. https://steambangers.com/game/630/alien-swarm
Embed the live badge

Reviews set the ceiling, and the size of the player base moves the BANG Score inside it. How it works, and where it is weak → Steam reviews as of Nov 4. A number here look wrong? Tell me and I will check the inputs.

Critics vs players+18
Critics77
Players95
Player favorite. The critics underrated it.
Metacritic critics · 21,658 Steam player reviews

Tags

Steam user tags as SteamSpy recorded them

Details

DeveloperValve
PublisherValve
GenreShooter
Released2010
Players3.5Mowners, SteamSpy estimate
Achievements66