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newvs 24h ago · updates every minute
Last 7 days · history since Nov 1, 2026
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87% positive of 8 · 8 user reviews · Live from Steam
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Free on Steam. The demo has its own app, so its players are counted separately.
Take control of Steven, a sperm who must survive deadly spermicide on his way to the egg! Swim, dash, and squirm through perilous stages of action and thrills! Will you give birth to a new life?
Live data from Steam, tracked by SteamPlayerBase.
What changed on Steam for this game since we started following it: prices and sales, builds, name, release date and review score.
Review score: 87% on 2026-11-01 → 87% today (8 reviews)
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Not tested by Valve yet. Results from Valve's own testing.
Valve hasn't published test details for this game.
Every build released on Steam for this game since we started tracking it, with the developer's patch notes. Updated within minutes of each new build.
FINALLY, the update number we've slowly been working towards, 2.2.2! If only I was still 22 years old, but today was actually my birthday, so it's 23 instead. Yep... any other Steam games where the developer announces their own birthday in the patch notes? Jus…
Hey, hope you're having a nice holiday season! Here are two little changes - one that reminds you to always use protection, and another that gives PJSim a BBL (Better Business Logo). CHANGELOG Unpacked the game's executable to stop false positives. The game en…
Welcome to 2024!!! You thought I'd finally left? Nah, Steven the Sperm forever, baby! If STS was an actual child, it'd be in kindergarten or first grade by now, and much like that theoretical child, STS has been getting better and better over the years! So for…
If you think about it, every birth is an achievement. So for this update, take a second to reflect and look back on everything you've achieved: CHANGELOG Achievements you've unlocked will refresh with Steam once you enter the Achievements screen on the Extras …
Never would've thought there'd be two updates in a row dedicated to the cursor, but it is what is... CHANGELOG You can now toggle whether the cursor will hide itself when buttons are pressed. This is set off by default. Ingame cursor will no longer jitter when…
This update will help keep your pointer in your pants... or window... or whatever. CHANGELOG The cursor will now become invisible if any button is pressed. Now you don't have to move it offscreen! You can now choose whether to use STS's cursor or the system de…
So. You know what day it is. That's right, you read the title, It's National Gamer Day!!!!! YIPPPEEEEEEEEEE!!! ...or wait, It's Steven the Sperm's fifth anniversary here on Steam! I've said it before and I'll say it again - this whole experience has been super…
It takes 6 months to develop a baby, but it took about a year of on-and-off work to bring you this update, so that must mean it's twice as good as an actual human child! …or maybe that's not a good way to phrase it, but you get the picture. But yep, you saw th…