About r/KerbalSpaceProgram
In its own words:
The Kerbal Space Program subreddit. For all your gaming related, space exploration needs. https://kerbalspaceprogram.com
Community guide
r/KerbalSpaceProgram (#697, about 1.5 million subscribers) — The Kerbal Space Program subreddit. For all your gaming related, space exploration needs. https://kerbalspaceprogram.com A recent sample averaged 40 posts a day (~29% gallery, ~29% image, ~24% text). Its public rules include: Please remain kind and civil at all times; No posts unrelated to KSP; No real life disasters that resulted in fatality; Piracy is not allowed; Low-effort content will be removed. It is listed under “Games”.
What belongs here
Stay inside the room’s stated scope rather than adjacent off-topic dumps. Spoiler tags matter for fresh releases, endings, or results. Piracy and illegal distribution talk is removed. Low-effort or empty shitposts are often removed—add context that fits the purpose.
How it differs from lookalikes
Prefer this room when your post matches its description and rules—not merely a larger sibling community. The public rule list is long enough that skimming all entries once beats assuming defaults from similar subs.
Practical pointers
Read the live sidebar/rules before posting; rules can change. Err on spoiler tags. Common flairs include: KSP 1 Image/Video, KSP 1 Question/Problem, KSP 1 Mods, KSP 1 Suggestion/Discussion.
The community was created on Jul 11, 2011, which makes it 15 years old. Since Nov 2, 2026, it has gained 376 subscribers (+0.03%). Among the 20 communities on our science list it is number 7 by size. It sits just behind r/warriors (#696) and ahead of r/ifyoulikeblank (#698) in our ranking.
What sets r/KerbalSpaceProgram apart
Its rhythm is strongly tied to time zones: the busiest hour (17:00 UTC) sees about 6.7× as many posts as the quietest (07:00 UTC).
Subscriber growth
Between Sep 19, 2026 and Nov 9, 2026, r/KerbalSpaceProgram climbed from 1,528,110 to 1,530,686 subscribers (+2.6K, +0.17%). That is about 51 new members per day. The chart shows 10 weekly subscriber counts.
Top posts on r/KerbalSpaceProgram this week
What the community upvoted most over the last seven days, as ranked by Reddit (collected Nov 7, 2026).
- Avionics-free recoverable runway boosteru/TheSpacePotatoYoutub · Nov 4 · video
- EVA on the far side of the moonu/ISSnode-2 · Nov 5 · video
- rocket doesn’t launchu/CanPuzzleheaded3270 · Nov 6 · image
- Analog Resource Display for Kerbal Space Programu/the_economy_fools · Nov 1 · video
- Why does my plane turn to the left slowly when going upu/Strange-Cicada2091 · Nov 3 · video
- An EVA suit designed for Eveu/YetiBomber101 · Nov 5 · image
- I didn't have enough fuel to correct my orbit around Eve. So I used its atmosphere to correct it instead.u/Bulliedchild · Nov 1 · video
- Jool through a Kerbals amateur telescope.u/Single-Argument4372 · Nov 5 · image
- Very kerbal SSTO landingu/Sharp_Bus_6003 · Nov 7 · video
- "Breaking News: The Alines Are Real". A few photos from my recent trip to a Mün landmarku/ArtemisAndromeda · Nov 6 · gallery
All-time top posts
The highest-ranked posts in the history of r/KerbalSpaceProgram, from 2015 to 2026, ranked by Reddit.
- Matt Lowne's videos all Copyright claimed, even though the music "Dream" is one of Youtube studio's copyright free music.u/Spancerr · Nov 15, 2019 · 19,004 points · 895 comments · image
- Thanks for all the great advice on my last post! I listened, redesigned from scratch and finally made it to orbit!u/TheSpacePotatoYoutub · Apr 13, 2026 · video
- Net Neutrality On Tylou/Panda_Hero01 · Nov 22, 2017 · 18,612 points · 237 comments · image
- The newly-formed Australian Space Agency launches its first spacecraftu/NovaSilisko · Sep 25, 2017 · 16,998 points · 351 comments · video
- Had this one been done yet?u/everydayastronaut · Oct 9, 2019 · 16,150 points · 291 comments · image
- Saw this on Steam. Why is no one talking about it?u/InTheNameOfScheddi · Apr 23, 2018 · 16,689 points · 1,437 comments · image
- Elon, this is what "going Kerbal" REALLY means!u/The_ShadowZone · Dec 3, 2017 · video
- Unlimited Power!u/ksp_HoDeok · Jun 27, 2021 · video
- 1.0 is out!u/wave100 · Apr 27, 2015 · 5,737 points · 1,200 comments · link
- This is a cry for helpu/notrazerfish · Mar 11, 2020 · 11,203 points · 243 comments · image
What r/KerbalSpaceProgram talks about
We read the titles of 241 recent posts (Oct 29–Nov 5), the words that come up most are “ksp”, “help”, “mun”, “station” and “space”. Other frequent themes are mission, orbit, rocket, kerbal, landing and crew. Recurring phrases include “space station”, “near future”, “minor planets” and “outer planets”. By format, 29% are galleries, 29% are images and 24% are text posts.
Popular post flairs: KSP 1 Image/Video (135), KSP 1 Question/Problem (56), KSP 1 Mods (25), KSP 1 Suggestion/Discussion (16), KSP 1 Meta (4), KSP 2 Image/Video (2).
Activity and best time to post
r/KerbalSpaceProgram gets about 40 new posts a day. The public archive holds 435,437 posts and 4,639,366 comments in total, about 10.7 comments per post. Last week the busiest day was Saturday (43 posts) and the quietest was Wednesday (23). Posting peaks around 17:00 UTC and is lowest around 07:00 UTC.
Rules of r/KerbalSpaceProgram
The moderators of r/KerbalSpaceProgram list 7 rules. In short:
- Please remain kind and civil at all times
- No posts unrelated to KSP
- No real life disasters that resulted in fatality
- Piracy is not allowed
- Low-effort content will be removed
- Leave moderation to the moderators
- Tag spoilers/Easter eggs as spoilers
How to join
Open reddit.com/r/KerbalSpaceProgram and press “Join”. Read the community rules in the sidebar before you post: every subreddit is run by its own volunteer moderators.
Frequently asked questions
How many subscribers does r/KerbalSpaceProgram have?
r/KerbalSpaceProgram has 1,530,686 subscribers (Nov 9, 2026), which makes it the #697 safe-for-work subreddit in the SubMouse ranking. It added 2,576 members between Sep 19, 2026 and Nov 9, 2026.
When was r/KerbalSpaceProgram created?
r/KerbalSpaceProgram was created on Jul 11, 2011, so it has been around for 15 years.
Is r/KerbalSpaceProgram still active?
Yes. r/KerbalSpaceProgram gets about 40 new posts a day (average of the last four weeks). Over its lifetime the archive counts 435,437 posts and 4,639,366 comments. In a sample of 241 recent posts we counted 173 different authors.
What is the best time to post in r/KerbalSpaceProgram?
Based on post counts from Oct 29, 2026 to Nov 4, 2026, the busiest day was Saturday and the quietest Wednesday, and most posts arrive around 17:00 UTC, with the fewest around 07:00 UTC. More posts also means more competition, so a quieter hour can help a post get noticed.
What kind of posts are on r/KerbalSpaceProgram?
The community describes itself as: “The Kerbal Space Program subreddit. For all your gaming related, space exploration needs. https://kerbalspaceprogram.com” Recent post titles often mention ksp, help, mun, station and space. Most posts are galleries (29%).
Is r/KerbalSpaceProgram SFW?
Yes. Reddit does not mark r/KerbalSpaceProgram as an 18+ (NSFW) community. SubMouse lists safe-for-work subreddits only.
What are the rules of r/KerbalSpaceProgram?
Join the community on Reddit first, then use “Create post”. r/KerbalSpaceProgram accepts both text and link posts, with images, videos, galleries and polls enabled. It has 7 posted rules, starting with: “Please remain kind and civil at all times”; “No posts unrelated to KSP”; “No real life disasters that resulted in fatality”. Moderators remove posts that break the rules, so read them in the sidebar before posting.
What subreddits are similar to r/KerbalSpaceProgram?
Communities with similar topics include r/space (28M), r/psychology (4.9M), r/HaircareScience (1.1M), r/science (34.6M) and r/askscience (26.4M).
Stats from public data (data updated Nov 9, 2026; activity, rules and archive totals via the Arctic Shift archive, Nov 6, 2026; top posts from Reddit’s public feeds). Point and comment counts are archive snapshots and can be lower than on Reddit today. SubMouse is an independent directory and is not affiliated with Reddit or the moderators of r/KerbalSpaceProgram.