"Unlike the Steam Workshop or local content mods, this SDK gives mod makers the ability to change, extend or rewrite TF2, making anything from small tweaks to complete conversions possible," Valve ...

And, importantly, the TF2 game source code can be used to create ... running in 64-bit should be easier to run on macOS through CrossOver or Wine, but unless Valve is willing to build full Metal ...

The Final Fantasy crossover will launch on 13th June and consists of four decks based on Final Fantasies 6, 7, 10, and 14. It's the lead card from each of these decks that's now been revealed ...