You should not use the 1.0 version (although is marked as "stable") due to the following:
- It contains a lot of bugs that were fixed in the nightlies
- It does not support the latest mod format used by the nightlies
- It does not support TFTD like the nightlies
So, as Warboy said, use the nightlies.
Sadly, 1.0 is marked as "stable" since it manages to run, but the nightlies might contain undiscovered major bugs (they are usually fixed in the next nightly) that may prevent them from even starting. This is the price of living on the edge.You should use one of the PPAs mentioned by R1dO (the
winterheart's PPA seems to be more up-to-date with the nightlies), as it is way easier than building from source every time (the source code can be found
on GitHub, if you want to take a shot at compiling it yourself).
Once you get the nightly installed, you need to add the original UFO and/or TFTD data in the mix. You can find some quick instructions on how to do that
right here.
Then you can go to the
modportal and download mods from there.
There are additional instructions on
Ufopaedia (the portal seems to be down ATM).
Ask around on this forum or
in the chat if you need additional assistance.
Have fun!
BTW Warboy, I think a "stable" version with TFTD and current mod format support is in order...