RimWorld Science Alpha 17: Cover and Accuracy — RimWorld Alpha 17 Weapons and Cover SCIENCE!!!

Опубликовано: 25 Июль 2026
на канале: Bjorn Strongndarm
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RimWorld Science Alpha 17: Cover and Accuracy — RimWorld Alpha 17 Weapons and Cover SCIENCE!!! (How is a shot’s accuracy calculated, and how does cover figure into it?)

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Every shot your colonists take has a certain chance to land on its target. This is calculated by three things: (i) the SHOOTER’S accuracy for the shot; (ii) the WEAPON’S accuracy; and (iii) the target’s COVER. Each of these is a percentage; the percentage chance of landing the shot is just the product of these three values.

Shooter accuracy is a stat. It contributes to the shot by being raised to the power of the distance of the shot. That is, if a shooter with a 90% accuracy is firing at a target 10 tiles away, then the shooter’s contribution to shot chance is 90% raised to the power of 10, or about 35%.

Weapon accuracy is a function of the weapon’s type, durability, quality, and (again), distance to the target.

Each item that gives cover has a cover value, a percentage. That’s the percentage of shots it blocks. So the remainder contributes to the chance of being hit. For instance, sandbags give 65% cover. This means that 35% of shots get through, so the chance of a shot hitting gets multiplied by 35% for the cover value.

After sorting out these values, in this video we look at different types of cover, and more importantly, the way that angles figure in to cover. We look at a couple of fairly good ‘shooting spot’ configurations, and demonstrate that roofs (and darkness) no longer gives any cover bonus.

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RimWorld follows three survivors from a crashed space liner as they build a colony on a frontier world at the rim of known space. Inspired by the space western vibe of Firefly, the deep simulation of Dwarf Fortress, and the epic scale of Dune and Warhammer 40,000.

Manage colonists' moods, needs, individual wounds, and illnesses. Engage in small-team tactical gunplay. Fashion structures, weapons, and apparel from metal, wood, stone, cloth, or futuristic materials. Fight pirate raiders, hostile tribes, rampaging animals, giant tunnelling insects and ancient killing machines. Tame and train cute pets, productive farm animals, and deadly attack beasts. Watch colonists develop relationships with family members, lovers, and spouses. Discover a new generated world each time you play. Build colonies in the desert, jungle, tundra, and more. Manage quirky colonists with unique backstories, traits, and skills. Learn to play easily with the help of an intelligent and unobtrusive AI tutor.

RimWorld is currently in Open Alpha. The current version is RimWorld 17. You should get it!

RimWorld Alpha 17 from Ludeon Studios: http://RimWorldgame.com/

RimWorld Alpha 17 on Steam: http://store.steampowered.com/app/294...

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About Bjorn Strongndarm’s Let’s Play: Games are fun! But they’re more fun when you share them with others. I aim to provide mature but family-friendly commentary in a way that enhances the story that unfolds in the game. In my RimWorld gameplay commentary, I try to draw out the stories of the colonists themselves as much as possible. Having fun is more important than winning. Remember, Losing is Fun! (At least, if Done Right.)

(Oh, and p.s.: It’s pronounced “Strong-in-the-arm”. With thanks to Sir Terry Pratchett.)

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My RimWorld Let’s Play series:

Series 1 (RimWorld Alpha 14):
   • [Blind] Bjorn Plays RimWorld Alpha 14  

Series 2 (RimWorld Alpha 15):
   • Bjorn Plays RimWorld Alpha 15 (RimWorld Se...  

Series 3 (RimWorld Alpha 15):
   • Bjorn's Randy Random Rimworld Alpha 15 Van...  

Series 4 (RimWorld Alpha 15):
   • Bjorn's Randy Random Rimworld Alpha 15 Van...  

Series 5 (RimWorld Alpha 16:)
   • Bjorn Plays RimWorld Alpha 16 | RimWorld A...  

Series 6 (RimWorld Alpha 16, Tribal Start:)
   • Bjorn Plays RimWorld Alpha 16 | The Outcas...  

Series 7 (RimWorld Alpha 16, Cassandra Classic Extreme:)
   • Cassandra EXTREME: Bjorn Plays RimWorld Al...  

Series 8 (RimWorld Alpha 17:)
   • RimWorld Alpha 17 Gameplay | Bjorn Plays  

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Credits (outro music):

“AT1”, by Synapsis
http://freemusicarchive.org/music/Syn...

Licensed under Creative Commons 3.0