

A few takeaways from the move:
- Any modifications must be released as mods
- Players downloading the mods must own the base game
- The mods must be free and no aspect of the mod can be monetized.
- The mods can now access TF2 steam inventory for cosmetics and weapons (but cannot modify the inventory)
Lol. It’s so greedy of them!
Jokes aside. It’s an interesting distinction to make. Even though the source code is freely available, it doesn’t mean developers have free reign to do anything they want like they could with open source software. Apart from special circumstances, everything made with the source code will still be mods.