Basic Leaderboards are now tracking for the current game mode.
You can check them on steam at http://steamcommunity.com//stats/554920/leaderboards/1573267
Note: As this game is in very early access, there may be resets if required for game modes and mechanics.
Local highscore tracking, and global leaderboard access from in-game coming soon.
Infected Mall Santa added.
More coming, stay tuned!