Extra Mods to Consider

If no link is provided for a mod, it is available via CKAN. Remember, when setting up a new install, only add non-CKAN mods after you've installed all CKAN mods.

This guide skips all mods that are installed by default when you install RO/RP-1. If you have not installed RO/RP-1 using that guide, please do so first before returning here.

NOTE: Unless otherwise mentioned, install all mods through CKAN. This will ensure you have the most up-to-date version possible, and that all dependencies are correctly installed.

NOTE: If you don't know how to install non-CKAN mods, read the simple guide!

Table of Contents

1. Principia

2. Major Gameplay Additions

3. Pretty Graphics & Sound Mods

4. Other High-Quality Parts Mods

• Rocket Parts
• Misc Parts

5. Quality-of-Life Mods

6. The Blacklist: Mods to Avoid

Note: this mod list is intended as a menu, not a bucket list. While installing the mods from sections 1, 2, and 3 is highly recommended, trying to install everything at the same time will likely cause a mess.

§1: Principia

• Principia, Requires Manual Install, check the README - Replaces stock's patched conics approximation of celestial gravitation with a much more substantial n-body model, enabling Lagrange points, sun-synchronous orbits, and perturbation due to mascons.

  • Reading the Principia wiki (linked in the sidebar) is highly recommended.
  • Because Principia is written in C++, not in C#, you can't install it like other GitHub mods. Click the link, scroll down to the readme, and follow the download instructions.

§2: Major Gameplay Additions

• kOS - A scripting utility for your rockets. Extremely powerful and very useful. Has extensive documentation (linked in the sidebar) and a very helpful Discord server.

§3: Pretty Graphics & Sound Mods

• Docking Port Sound FX - Adds sound effects to docking. Check the thread for alternative sounds.

§4: Other High-Quality Parts Mods

Rocket Parts

Although ROEngines will provide most of the engines you could ever want for your RP-1 career, here are a few mods that offer new options.

• Cryo Engines - This mod pack includes many current and near future methalox and hydrolox engines, such as Vulcain 2, LE-9, RL-60, STBE-3, Raptor, and Avio M10.
• Kerbal Atomics - Although not fully configured, this mod pack provides some more exotic NTR options, such as liquid-core NTRs and the Low-Pressure NTR.
• Near Future Launch Vehicles - Although not fully configured, this mod pack provides many modern booster engines, such as the RD-701/704, AR-1, RS-84, and STBE-1, and TR-107.
• ROEngines Extended - A quick and dirty mod that clones existing ROEngines parts to create some more obscure engines, including the AR-22, G-1, RD-263, RL-200, RS-44, and RS-76.

Misc Parts

Various high-quality parts mods that provide unique parts for your RP-1 career.

• Hullcam - Allows you to lock the view to a camera mounted on your rocket for Saturn V and SpaceX style shots.
• InternalRCS - A pack that adds a number of small configurable RCS parts that mount flush with your rocket's body ala the Space Shuttle's orbital maneuvering system.
• Near Future Construction - Adds various constellation-inspired large structural parts for large ships or space stations.
• Near Future Electrical - Adds nuclear reactors.
• Near Future Exploration - Adds antennas and other probe parts, including some extremely large folding antennas.
• Near Future Solar - Adds large solar panels, although it is largely made redundant by ROSolar.
• Shuttle Orbiter Construction Kit - A high quality (but stockalike) Space Shuttle mod from benjee10
• Space Shuttle System Requires Manual Install - A high quality, photorealistic Space Shuttle Mod from DECQ. Outdated, but still works fine on KSP 1.12.3
• Buran Energia Mod - A high quality, photorealistic Buran and Energia mod from DECQ and Alcentar.
• Soviet Spacecraft - Contains most Soviet spacecraft, including Vostok, Voskhod, Soyuz 7k-OK, LOK, and T, and TKS/VA.
• Salyut Stations - Contains parts for Soviet Salyut/Almaz stations.

§5: Quality-of-Life Mods

• Editor Extensions Redux - Gives more symmetry options, finer part angle control, and other VAB/SPH quality of life features.
• Historian - Adds an informative and RO-integrated HUD/infobar to your screenshots. Highly configurable.
• HyperEdit - Same as stock, good for testing, debugging, and saving yourself from the occasional Kraken attack.
• Kerbal Alarm Clock - Integrates with KCT and several RP-1 features to stop warp on alarms. Almost required for deep-space missions.
• Kronal Vessel Viewer - Generates crisp orthorhombic projected images of your rockets. You might have to fiddle with your DirectX settings to get it working right.
• NavHud - Full-screen navball overlay. Helps a lot with lining up planes for a runway landing and also has alignment indicator for docking.
• WASD Editor Camera - A very different way to move around in the VAB and SPH, but can make crafting large and complex crafts much easier.
• Waypoint Manager - Display waypoints in flight and create custom waypoints.
• Wernher Checklist Continued - adds a checklist to the VAB that detects if certain parts are on your vessel and also adds a pre-flight checklist that you can access while on the pad and in flight. It helps you remember to add certain parts to your vessel such as solar panels, RCS, parachutes, and other parts before you launch and having to revert or scrub a launch. The RP1 config can check for example, if you have enough payload on your spacecraft for the contract you're aiming to do. The RP1 config is configured to work with RA,RT, and ROKerbalism. Download the mod through CKAN or from the forum page and install the RP1 config from the release or master branch from here.
• BetterTimeWarp - Adds the ability to reconfigure normal and physical time warp rates, allowing it to be adapted to RSS scale.

§6: The Blacklist: Mods to Avoid

The following is a list of mods, which, despite being commonly recommended for use with RSS/RO/RP-1 (even by CKAN), you may not want to install after all.

• RSSRunwayFix - A fantastic mod, but no need to install it any more! Now it's baked into RSS.
• SCANsat - The SCANsat v20.x consumes an extreme amount of memory when used with RSS (Often in excess of 32 GB). If you are using SCANsat, you should disable visual maps by going to the Gamedata/SCANsat/PluginData/Settings.cfg and setting VisibleMapsActive to false, which will help reduce memory usage.
• SSTU - Under no circumstances should you consider using SSTU. It simply doesn't work nor will it ever with RP-1. ROTanks provides some of the functionality you're looking for.
• Stage Recovery - Throws off early-game balance, spams your log, adds lag. Don't use it.
• Textures Unlimited Recolor Depot (TURD) - Basically useless in RP-1, as you will use mostly Ven's or SXT parts, which this mod doesn't touch. Completely useless if you are using ReStock. Not a hard blacklisting, but generally not worth the extra load times.
• KRASH - simulations are now handled by RP-1
• Kerbal Engineer Redux - Some bugs with the RCS calculations in KER cause it to occasionally trigger crashes. It also slightly misreports delta-V, due to not properly accounting for some RealFuels features. There is a fixed version on the RP-1 discord if you really need it. (pinned in #rp1-general)