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Commander Keen
Commander Keen: Invasion of the Vorticons: Episode 1: Marooned on Mars (Dec. 14th 1990) Episode 2: The Earth Explodes (1991) Episode 3: Keen Must Die! (1991) Commander Keen's very first adventure, and the debut of id's groundbreaking side-scrolling technology.
View on Steam ↗ $4.99 (US · as of 2026-07-26)What players say
Steam review score and the most-helpful voices, which may include critical ones. Data as of 2026-05-20.
“Commander Keen, developed and published by id Software, stands as one of the most influential and technically groundbreaking platformers in PC gaming history. Originally released in 1990 as Commander Keen in Invasion of the Vorticons, it arrived at a time when IBM-compatible PCs…”
— a player, Steam review · 12 hrs played“Missing Keen Dreams and Aliens Ate My Babysitter. Which is a shame because the last one was my favourite growing up. However, for the price and easy of use on newer systems this is still a nice bundle of classics to have.”
— a player, Steam review · 4 hrs played“I grew up with these games, i think most specifically Keen 2 and 4. so i have a nostalgia lens. They were allot of fun, platformers but the whole setup plays like a twisted dream of a child, which is the point so it does that very well. i think the whole premisises was quite…”
— a player, Steam review · 0 hrs playedPlayer activity
Monthly average concurrent players. Live count fetched 2026-07-11 11:41 UTC · history via SteamCharts.
Price tracking
US-region pricing (USD), sampled twice daily by our own tracker since 2026-07-11. Steam prices vary by region — always confirm your local price on Steam.
Regional prices at last sample, in local currency — Steam sets each region's price independently.
Cheapest → most expensive, converted to USD at ECB reference rates (2026-07-24). Relative comparison only.
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Screenshots
Official Steam store screenshots — click any shot to enlarge.
Facts & details
From the Steam store record, snapshot 2026-05-20.
| Genres | Action |
| Player tags | Platformer · Classic · 1990's · 2D · Action · Retro · Old School · Singleplayer · Sci-fi · Family Friendly · Side Scroller · Adventure (SteamSpy community voting) |
| Features | Single-player · Steam Cloud · Family Sharing |
| Languages | English |
| Estimated owners | 100,000 – 200,000 (SteamSpy) |
Minimum system requirements (PC)
Minimum: A 100% Windows XP/Vista-compatible computer system