An unlikely ultimate crossover of the most popular first-person shooter characters into one big hero shooter game.
Because this is based on class-based and hero shooter-style games such as Team Fortress 2 and Overwatch, many of the characters - who are from single-player games and have large arsenals of weapons and abilities - have to be watered down to specific move sets both to fit into the genre and to give them clearly-defined, unique roles/styles.