Where can i download the f-3-tiles release for linux?

i can only find the f-3-curses available

Nowhere. It was not built.

bummer… can i build it myself? i remember that being an option somewhere a long time ago but i have no clue where i can get the binaries (i think they were called binaries)

Yes, you can build by yourself. See Cataclysm-DDA/COMPILING.md at d4d82f850eaba2f46a5fec1afd7eb3c8b9b0f608 · CleverRaven/Cataclysm-DDA · GitHub