To get to the most interesting part of this guide right away: In the following images are all the requirements for each launch location.

Each graph shows how to unlock one particular launch location, which is shown at the top of the graph. To unlock them, you will need to complete certain contracts (shown in light blue), which can themselves require other contracts to be completed or specific nodes in the tech tree (dark blue) to be unlocked. Some launch locations also require you to have already unlocked other launch locations, which is why they can show up at the bottom of a graph as well.
Not all of these contracts are marked with the "progression" tag, which isn't exactly helpful when trying to find out which contracts you need to do.

One important note: Just because you have all the prerequisites for a contract does not mean you will be instantly offered that contract! You can however refresh your contracts (open contract window > ... in top right > Refresh Contracts), and it should show up after a few refreshes.

Lets take the DSC Secondary Runway as an example of what that means:


In order to unlock this runway, you have to complete the contract "Pilot Licence". In order to be offered this contract in the first place however, you have to have the tech tree node "Efficiency 100" unlocked AND have already unlocked the Ali Base runways (10L and 28R).
(Look at the corresponding graph to see how to unlock those).

• Checking which tech tree nodes you have unlocked should be relatively self-explanatory.
  But just to be thorough: From your main screen, go to the tech tree (upper left) and check whether you have unlocked the node in question
  
• Checking whether you have done a specific contract already is a little harder. As far as I know, there is no screen in-game showing all your completed contracts. If you don't remember if you already did a contract, check if you are offered its successor (e.g. Valley Air Race Round 2 after you did Valley Air Race). Also check your rejected contracts (open contract screen > ... in top right > Show Rejected) to see if its there.
  A last resort would be to check your save files, which to contain all your completed contracts. You can find those at
  
  Windows: C:\Users\[username]\AppData\LocalLow\Jundroo\SimpleRockets 2\UserData\GameStates\[gamestate]\PreFlight\gamestate.xml Linux / Proton: ~/snap/steam/common/.local/share/Steam/steamapps/compatdata/870200/pfx/drive_c/users/steamuser/AppData/LocalLow/Jundroo/SimpleRockets 2/UserData/GameStates/[gamestate/]PreFlight/gamestate.xml
• Checking which launch locations you have unlocked is easy however. Simply go into the build menu, select start for a craft and check which locations are available.

Here I want to let you know about some strategies & approaches for some of the harder contracts. If you want a full guide on any specific contract, this is sadly the wrong place (that is waaay more work). But still, I believe that there is some stuff that can significantly help you with these. In no particular order:

• All the "bring X payload to Y place on Droo" missions have payloads that do not stick to your craft. You need to box them in using Struts or Structural Panels so they don't fly off. However, you will need to set them on the ground at your target, so you need some of those to move out of the way (using pistons, rotators or hinges) so you can drop the cargo off once you're there.
  
• DSC Bay: Don't go for this until you have at least something unlocked at the DSC. You need to go to the DSC Bay, which is waaay easier if you can start at the DSC compared to travelling about 350 km from the Ali base
  
• DSC Launch Pad: You need to land on the drone ship off the coast of the DSC from space. The proper way to do this is to write a Vizzy script that can auto-land for you. The hacky way to do this is to stick some wings and parachutes on your re-entry module, fly to the drone ship and use a bunch of quick-saves until you manage to deploy the parachutes at the right moment.
  
• DSC Main Runways: You need to bring a container to Hippotalya Ground Station. Be warned, there is no runway there, only a small flat area. You will either need a cargo VTOL aircraft (vertical take-off and landing), or some type of drone / helicopter, or once again a bunch of prachutes and quicksaves
  
• DSC Large Pad: You need to get 1000 t of stuff into orbit in a single launch. Why not make use of that by launching a bunch of fuel (and an engine) which you can then use to bring your Space Port Esperanza into a more convenient (equatorial) orbit? You can still complete more SPE missions afterwards, the game does not care what the orbit of the SPE is once you completed the first SPE contract.

• I created this guide based on Version 1.3.2 in June 2025. These requirements could potentially change in a future update, though I doubt there will be major changes.
  
• If anything is unclear, or you find some mistakes in the guide (cause I'm sure there will be some that snuck through), let me know in the comments.
  
• I created these graphs by running all potential contracts through a python script that extracted all contracts unlocking a launch site. It then recursively checked all prerequisites for that contract to build a tree of all dependencies. I then converted this tree into the graphs shown in the guide. Since the devs store most of the game data as .xml-files (Thanks!), this was pretty easy (about 2h of work).