Useful information about the creation of Challenges (Missions, Companies, Maps) for the game Planetbase:

1) "Creating Challenges"- the official guide from the developers of the game: https://steamcommunity.com/sharedfiles/filedetails/?id=677895200
 
2) "Blank XML for challenges with instructions" https://steamcommunity.com/app/403190/discussions/0/2119355556483427227/

3) "Save file editing" https://steamcommunity.com/sharedfiles/filedetails/?id=537016058

4) "Creating Planetbase challanges" (from Base Invaders) https://steamcommunity.com/sharedfiles/filedetails/?id=1955921323

5) "Create an island map for challenge" https://steamcommunity.com/sharedfiles/filedetails/?id=1987002995

6) [Rus] "How to create a mission (challenge) with an unusual map?" https://steamcommunity.com/sharedfiles/filedetails/?id=1983521727

7) [Rus] Alignment of landscapes with a cheat mod https://steamcommunity.com/sharedfiles/filedetails/?id=1983467709

8) [Rus] F.A.Q. Challenges (Missions \ Companies) - All About Challenges https://steamcommunity.com/sharedfiles/filedetails/?id=1979452591

9) [Eng] Guide in English with the description of the program "Planetbase Challenge (Mission) Editor (PBCE)": https://steamcommunity.com/sharedfiles/filedetails/?id=1991143520

10) [Rus] Guide in Russian with the description of the program "Planetbase Challenge (Mission) Editor (PBCE)": https://steamcommunity.com/sharedfiles/filedetails/?id=1983563107





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P.S.:

A full LIST OF GAMES similar to the game "Planetbase":

A full list of games similar to the game "Planetbase" you can see here:
1) Guide "Space colonization & survival Games" - https://steamcommunity.com/sharedfiles/filedetails/?id=1994216417

2) Group SpaceExperience in Steam: http://steamcommunity.com/groups/SpaceExperience
This group contains the largest and most structured list of games and programs about space.
Here you will find everything that exists to feel like in space, see VR space, build a colony,
feel the harsh conditions for survival, control a rocket and repair it, arrange a battle in space, see 3D maps of planets and universes,
and much other. List of strategies

3) Curator SpaceExperience of games about space in Steam: https://store.steampowered.com/curator/37277628-Space-Experience/
Reviews on all space games.
A huge number of lists and categories.
The most complete information both among those games that have already been released and among the new products.
List of strategies 
Here you can choose a space-themed game to your liking.
Also, here is information about all distributions of games and sales.

Enjoy!