Wolfenstein Enemy Territory #etlegacy is still a nice game. Lot of fun. OpenSource.

https://nostrcheck.me/media/b5db2c16e1037cece8fcb4e8591723a6dfc97dec76dbce250a8484ec25730230/8005a239c0219a99d85fa0d83755afd682ed81185c8432f95d8b9f9301e7c8a3.webp