Update March 22nd: Leaderboards

Introducing Steam Leaderboards! Now you can compete with players globally to climb the leaderboard. The number of times you complete a mission is now recorded on this leaderboard:
https://steamcommunity.com/stats/2743310/leaderboards/16009963

Adding Steam Leaderboards is the foundation for future features including;

1. Having a leaderboard visible in the game. Maybe see your name on a billboard in Opossum City
   
2. Having unlockable cosmetic items like gun skins and character clothes. Each mission can have different items to unlock after completing them a specific number of times.
   
3. Adding more leaderboards for other metrics; most zombies killed, fasted time to escape Opossum City, etc.