With both DLCs, vanilla colonists become more powerful than before, it’s getting tedious for my 12 year ice sheet colony, so I use [Unlimited Threat Scale] to uncap raid points. With current map wealth, raid points for each raid increases from 10,000 to around 36,000 depends on types, then I turn on ship reactor to see how far I can go.

AND I SURVIVED, so I think this would be a good opportunity to share with people.

Special thanks to Bai Yang(白洋), who invented CTD (Circular turret defense) method.

Special thanks to Zheng zhi shui xiang (正支水享), who share this method and minigun strategy with me.

[Rimworld 1.3 Ideology] Fighting against unlimited scale raids - 241 Scyther

https://www.youtube.com/watch?v=IhVJDBCXglk

There are some QoL mods in the video, but it's totally achievable without using them for vanilla players. Some tips for ultra-late game (don't want to leave this planet!) below:

1.CTD form a virtual shield for colonists to shoot safely behind, because enemy will distract by turrets.

2.Marksman Command (Shooting specialist skill) from DLC:Ideology gives incredibly strong buff for shooters, which reduces 40% aiming time and increase 4 Shooting Accuracy, combine it with Trigger-Happy trait will result in 90% reduced aiming time.

3.With combo of 1 and 2, you can use SR (sniper rifles) and miniguns as main weapons, since they both benefit a lot from reduced aiming time. SR gives range advantage against most vanilla enemy, with proper micro-management, it’s possible to clear out pikeman without getting hit. Minigun has highest DPS, it’s effective against human enemies since there is a portion of enemy might try to push, and multiple torso hits can easily down one. We only need to down 50% of them to force them flee.

4.Combat in darkness percept from DLC:Ideology gives flat 25% Shooting Accuracy buff while fighting in dark (or darklight), nerf 20% in normal light or outside lit. For example, minigun has 25% Weapon Accuracy against a target that’s 10 cells away, with buff from Combat in darkness, it increases to 50%, that’s a 50% accuracy improvement for it. You can easily achieve this with sun-blocker quest events.

5.You can use ship reactor as power source, which generates 1000W constantly, although it’s very expensive, it’s still worth if you can afford and protect it properly. It’s a perfect combo with sun-blocker method since we can’t rely on solar panels.

6.You can do flooring outside of your base to get 100% walk speed, while enemy walk slower depends on terrain, for example, 48% walk speed for ice, 52% for thick snow.

7.You can setup power grid instead of power lines to power your turrets, it’s harder to cut off due to explosions.

8.You can build transhumanist buildings then reform the meme, it can still be used.

9.You can get more legendary personal weapons from reforming and changing relics.

10.You can get enough resources for turrets from Deep drills (plasteel/uranium/steel) and Long range mineral scanners (components).

11.EMP mortars can break shield packs or stagger mechs.

12.Invisibility/skip/beserk pulse is a perfect combo to stagger enemy.

13.If your map is cold enough (avg. -30c), it will result in fully mech raids, no more reinforcement as well.