➀ Valve has released the source code for Team Fortress 2, making it open source; ➁ This allows for game overhaul mods, new modes, and multiplayer experiences; ➂ Developers can create new game listings for the Steam Store using TF2 as a base.

1. The 11th European Congress for Positive Psychology, known as the 'Happiness Conference', will gather international experts and participants to discuss well-being, the role of AI as a happiness coach, and the value of hope in current crisis times. 2. The conference emphasizes the importance of community and interpersonal relationships for individual happiness. 3. Discussions will include the potential and risks of AI in enhancing human well-being and the cultural implications of a western-centric happiness ideology.