Sine Fortress

Sine Fortress is a mod set in a 1990's world of Team Fortress with a focus on environmental variety, new themes and the two new classes: The Rusher & Scientist. Existing classes and their roles stay mostly the same but experiment with new weapons rather than stat-swaps, with the additional classes focused on filling new roles and niches over recreating existing sub-classes and gameplay styles present in Live TF2.

Development History

Sine Fortress was born out of certain developers' displeasure at the project management of the early incarnations of Fortress Obscura. These developers, Menoly, Vruk, Soto and Not Dave or Daniel split off from the mod to form their own project on February 15, 2020. The project briefly attempted to continue the concepts Fortress Obscura set out to do but quickly moved toward the concepts and ideas seen in its current incarnation. The project initially discontinued in August 2022 after the main programmer left over fears related to Valve's uncertain relationship with TF2 Sourcemods at the time. A build containing all that was made during this incarnation of development would be leaked a month later in September.

The mod would be rebooted in May of 2023 with a refined vision of what it wanted to accomplish. The mod would go public with its reboot on August 6, 2024 with a devlog video showcasing what the team had worked on up to that point.