What are some alternatives?
When comparing Team Fortress 2 and Warframe, you can also consider the following products
Overwatch - Stylized team-based FPS
Doom - Doom is a science fiction horror-themed first-person shooter video game in which players assume the...
Arma - Experience true combat gameplay in a massive military sandbox.
Quake - Quake is a series of first-person shooter video games released by id Software.
Far Cry 4 - Action and also adventure hit fresh heights in Far Cry 4, a game which supports to the open world shooter techniques produced from previous additions in the franchise very closely.
Urban Terror - Urban Terror started as a realism based "total conversion" mod for Quake III Arena.