As the enshittification of the official rules continues unabated, let’s discuss alternative rulesets. Share your experiences and perhaps we can highlight more distinctive features of each.

"ProHammer Classic"
-Best of from 3rd to 7th edition with 5th edition as base.
-reactive fire, reworked wound allocation, classic overwatch, deeper shooting and much more
-rulebook, scenarios, campaign system, ChatGPT powered unit creation tool, TTS Mod
-Use with any Codex from 3rd - 7th edition
https://www.dakkadakka.com/dakkaforum/posts/list/796101.page
https://sites.google.com/view/prohammer40k?usp=sharing

"Custom40k"
-rewrite to modernize, streamline and rebalance the classic era (3rd - 7th edition)
-Alternating activation, Model backwards(and forwards) compatibility, huge customization(as in 3.5 chaos codex style customization), armor values for vehicles
-rulebook, codices, campaign system, scenarios and a working points calculator
-Discord: https://discord.com/invite/wnGAB3TYAY
https://bolterandchainsword.com/topic/383354-custom40k-homebrew-with-alternate-activation-huge-customisation-support-for-all-models/
https://www.dakkadakka.com/dakkaforum/posts/list/806918.page

"The Long War Project"
-fusion between 3rd edition and 7th/horus heresy. With some bits from 8th.
-rulebook, scenarios and codices
-actively maintained
-Discord: https://discord.com/invite/nkxx4ZUBRU
https://drive.google.com/drive/folders/1VBC2H49xydk8lPxgAjTY9sFtNmHQefp4

"Alternate 40k Rules"
-rulebook, scenarios, codicies
-not actively maintained since 2022
https://alternate40krules.wordpress.com/

"Waffle Edition /tg/-Edition"
-rulebook and codices, as well a WIP points calculator
-not actively maintained since 2024
https://docs.google.com/document/d/1H9BSZAMNLNupOgwFLyWrCNrb1uBG3j_9XbopwhAES_4/edit?pli=1&tab=t.0
https://1d6chan.miraheze.org/wiki/Waffle_Edition_40K