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Reentry - A Space Flight SimulatorNewsReentry has been updated to 1.0.21 - Bug fixes, Memory footprint, Apollo fixes
In-game event

Reentry has been updated to 1.0.21 - Bug fixes, Memory footprint, Apollo fixes

Reentry - A Space Flight Simulator · published 8 Dec 2025, 20:01 UTC · build 21103880

All newsPlayers around this dateRead on Steam

This patch continues to iterate on the 1.0 bits where I focus on bug fixes and critical issues players experience during their playthrough. In this patch various fixes and corrections are applied to the core game logic, the Command Module, and the Lunar Module. Quite a few fixes has been applied so make sure to check the patch notes list for the complete list.

Note: If this patch causes new issues for you, please report them. You can always revert back to a previous version using the Steam Betas tab for the game. The latest previous version is: 1.0.18.

Start In Orbit bug

I have received some bug reports related to an issue that can, on very rare occasions, spawn a capsule in-orbit, even if the mission is designed to start from the ground. This issue could happen if you would browse and select multiple missions from the Main Menu, before selecting and launching into a campaign mission or a custom mission. This patch corrects this issue.

Apollo System/Video Memory Footprint

Players with 16gb of RAM (minimum requirements) has reported various crashes when trying to play Apollo missions, and most of them has been related to not having enough memory to load into Apollo missions with the Earth Resolution textures set to high.

I have optimized the Apollo memory requirements and made changes to how the Moon is rendered from Orbit to reduce the amount of memory it requires. In addition, the Lunar Textures in use has had a 16k resolution surface color map and another 16k resolution elevation map. Players can now adjust the Lunar Texture and Elevation map quality from Main Menu -> Settings.

The default setting is MEDIUM, so if you were playing Apollo previously without issues, remember to change this setting to ULTRA.

Failure Cycle

Based on feedback I have changed so that the random failure cycle happens once every 30 minutes compared to every 5 minutes. The percentage can be increased, and there is a randomness of when the cycle will trigger with +/- 5 minutes.

Cockpit Bounds iterations

I have continued to iterate on the cockpit bounds for each of the spacecraft, and changed some of its internal logic. I will keep iterating on the bounds and refine them as the project develops.

Lunar Module Activation

Multiple fixes has been applied to the Lunar Module activation logic, steps and flow. I have corrected various instrument ranges, gauge green band zones, and multiple bugs reported from players activating the Lunar Module.

Lunar Surface Timeline Checklists

I have added the missing Lunar Surface Timeline checklists to cover the "black hole" of procedures between a Lunar EVA and Lunar Ascent.

Apollo Talkback Indicators & Cockpit updates

I have added the electro luminescent logic to all CM and LM talkback indicator to allow them to glow if panel integral light is available. They should follow the brightness selectors in the cockpit. I have also made the blue tint integral light a toggle, so players can decide to instead use the more realistic white integral light. You can find this in realism settings.

In addition, I have made some minor cockpit changes to the Command Module and the Lunar Module.

Patch Notes:

  • Start in Orbit bug

  • Moon Resolution selector (existing solution 16k always, now support 4k and 8k for 16gb systems)

  • Changed failure cycle to happen once every 30 minutes of gameplay compared to every 5 minutes. The percentage can be increased, and there is a randomness of when the cycle will trigger with +/- 10 minutes from that hour.

  • Fixed the ordering of priority radio requests such as requestion countdown holds etc.

  • Continued to iterate on cockpit bounds and out-of-view logic

  • LM activation fixes

  • LM Glycol Green Band range

  • LM Glycol pump diff. logic change

  • LM glycol pump nominal psi 23

  • LM Fixed an issue that had the potential to fail the DPS pressurization logic, spiking He >9999 psia

  • Fixed SPS thrust switch

  • Added the main Lunar Surface TIMELINE checklists

  • LM door opens inwards fix

  • Fixed an issue with the reflection probes in the Mercury Control Center

  • PAUSE label during 0x Landing Time Scale

  • LGC P40 fixes

  • Minor LM panel changes

  • Added the CM tbs to integral circuit

  • Setting to toggle the blue integral light tint for Apollo panels

  • LM Master Alarm fix

  • EMS RTOGO PAD parameter for Earth Entry fix

  • Added the LM Urine Line Heater cbs

More from Reentry - A Space Flight Simulator

Other announcements

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In-game event14 Sep 2026Patch 1.1.2 - Memory Leak fixes, Flight Plan Mode, Lunar ModuleThis patch focuses on the runtime memory management and memory leak fixes. It also continues to iterate on the entire "Flight Plan Mode" system where I try to slowly tune and implement ways of allowing you to fly closer and closer to the real mission trajectories in specialized mission scenarios. It also rolls out multiple fixes to checklists. With regards to systems it focuses quite heavily on…In-game event18 Aug 2026Patch 1.1.1 - Summer Fixes & ImprovementsI hope you’ve all been doing well! I’m back from my summer vacation, and this patch rolls out fixes and improvements based on reports received over the summer. Note: You can always revert to a previous version via the Steam Betas tab if needed. The latest previous version is: 1.1.0. The rollback option is there to ensure smooth user experience in case something does not behave as expected. Luna…In-game event3 Jun 2026Patch 1.1.0 - VR, Bug Fixes, Development Phase ChangeReentry has been patched to version 1.1! With the 1.0 launch behind us and many of the major launch issues addressed, development is now gradually shifting back to normal. This means continued improvements and bug fixes for existing content, while also dedicating time to new features and future additions to the simulator. The 1.1 update serves primarily as a soft transition into this new develo…