osu!

A free-to-play (F2P) rhythm game, developed by the Australian Coding Genius Dean 'Peppy' Herbert. Originating from the japanese Nintendo DS Game OSU! TATAKAE! OUENDAN!, peppy wanted to have a PC port of it, and several years later, many people are still playing it to this day.

Friend: Yo! Have you heard about that new game called osu?
You: Yeah, i heard it's OSU! TATAKAE! OUENDAN! just for the PC.