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RimWorld
RimWorld
IndieSimulationStrategy
Ludeon Studios · Ludeon Studios·$34.99
May 24, 2017 · 111mo ago

Alpha 17 - On the Road released!

AI summary1h

Alpha 17 introduces roads and rivers to the world map, new world quests, significant AI improvements, and a comprehensive rebalancing of skills and combat mechanics.

Buffs9

  • World Quests
    • Added Item Stash, Bandit Camp, and Caravan Request quests, providing new ways to earn rewards.Added
    • New building that scans for precious resource lumps in the world for caravan collection.Added
  • Mining SkillMining yield is now slightly dependent on the pawn's mining skill.FixedSkill Dependent
  • Melee CombatAdded a melee dodge stat, giving high-skill melee pawns a defensive advantage.Added
  • Mortars
    • Mortars are now cheaper and faster to build.Cheaper/Faster
    • Mortars now shoot faster.Faster
    • Mortars have improved accuracy.Higher
    • Mortar shells are now cheaper to produce.Cheaper
  • ArmorArmor now takes a constant fraction of incoming damage, preventing high-quality armor from being destroyed too quickly.Full AbsorptionConstant Fraction

Nerfs5

  • Mining SkillLow mining skill now results in a steeper speed penalty.Steeper Penalty
  • Melee CombatRemoved post-process curve from melee hit chance; low-skill pawns will find it much harder to hit targets.CurveLinear %
  • AI
    • Sapper groups now replace killed sappers and continue digging while defending, making them more persistent.Higher
    • Base defense AI is more sensitive, making stealth raids significantly more difficult to execute.Touchier
  • GeneralBlood loss recovery time is now significantly slower.50s4 days days

Other changes6

  • World Map
    • The world now generates with roads (five types) and rivers (four sizes), affecting how visitors and raiders navigate.Added
    • World generation is now chronological: continents, then rivers, then ancient society, then modern settlements.Chronological
  • World QuestsNew 'site parts' system allows for modular assembly of world destinations, increasing variety.Site Parts
  • AIRanged AI is now more intelligent and less likely to target irrelevant targets like chickens.Smarter
  • General
    • Alpha 17 is not compatible with saved games or mods from previous versions.CompatibleIncompatible
    • The buy/sell price spread for trading is now much wider.150%/50% %

subjects affected (8)

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How did this patch land?
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official notes
RimWorld · May 24, 2017

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Patch history

see all 56

  1. Update 1.6.4850 released
    Jun 8, 2026 · 1mo
    +41
  2. Update 1.6.4630 released
    Oct 31, 2025 · 8mo
    +4
  3. Update 1.6.4543 released
    Aug 6, 2025 · 11mo
    +6
  4. Update 1.6.4535 released
    Jul 29, 2025 · 11mo
    +31
  5. Update 1.6.4528 released
    Jul 22, 2025 · 11mo
    +81
  6. Update 1.5.4104 released
    May 24, 2024 · 26mo
    +7
  7. Update 1.4.3704 released
    Apr 19, 2023 · 39mo
  8. Update 1.4.3682 released
    Mar 28, 2023 · 40mo
    +42

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