Trepidation

Trepidation is an open source first-person shooter that is based on the IOQuake3 engine. If you are looking for a free first-person shooter with a sci-fi theme, this game may be the perfect fit for you. The initial idea for Trepidation was developed by members of the Star Trek Elite Force gaming community on April 9, 2006. However, the project disbanded before the game was complete in 2008, but it is currently back in development.

The goal of the developers is to create a game that can run smoothly even on older machines. This means that even if you do not have the latest and greatest hardware, you should still be able to enjoy the game without any issues. Additionally, Trepidation is designed to be fast-paced and fun to play. If you are a fan of first-person shooters and are looking for an open-source game with a sci-fi theme, Trepidation may be worth checking out.