What are some alternatives?
When comparing Metro Exodus and Perfect Dark, you can also consider the following products
Duke Nukem Forever - Duke Nukem Forever is an Action-Adventure, First-person Shooter, Single and Multiplayer video game developed by 3D Realms and published by 2K Games.
Warface - Warface - is a free online shooter with diverse PVP modes, exciting PVE missions, outstanding arsenal and millions of fans around the world!
Team Fortress 2 - Team Fortress 2 (TF2) is the sequel to the game that put class-based, multiplayer team warfare on...
Hawken - Hawken is an Action, Free-to-play, FPS, Robots, Science-fiction, Tactical, Futuristic, MMO, Co-Op and Multiplayer video game created and published by Reloaded Games.
Lenka - A black & white camera app for iOS and Android
Insurgency - Take to the streets for intense close quarters combat, where a team's survival depends upon securing crucial strongholds and destroying enemy supply in this multiplayer and cooperative Source Engine based experience.