Torque Game Engine's hardly an FPS designer; it's been used for a lot of other programs, and the only reason you think it's based around FPS design is because, for the most part, that's all you've seen. Look at the racing demo; that's hardly the same as an FPS. There are a lot of systems common to FPS games that stand out that are in other genres, but you dont see as much.
But if you still want something else (though I recommend looking deeper into Torque), I'd recommend trying 3DGS or DarkBASIC Professional.