How does your submission match the theme?
Player character actions have multiple purposes; for example:
- the demoman's flashbang can be used to get rid of melee enemies and separate targets for the killer's ambush
- the chem rifle can both heal friendlies and overheal mutants
- the hookman's hook can be used to haul in both ranged enemies and allies with useful group abilities
- etc etc

Third-party resources
Light Table (IDE)
http://lighttable.com/

Leiningen (Clojure command line tool)
https://leiningen.org/

Play-clj (Clojure game library)
https://github.com/oakes/play-clj/blob/master/UNLICENSE

Kingsbridge (font)
Free for commercial use (non-embedded) from Typodermic Fonts

Adobe Photoshop CC 2017 (image editor)
www.adobe.com/Photoshop

Contributors
Aarne Uotila