Hattrick

Hattrick is a free, browser-based MMO Football management simulator, developed and started in 1997 by Swedish programmer Björn Holmér and his development company ExtraLives AB. It can be seen as a direct competitor to the Football Manager series, especially Football Manager Live. Currently in its 47th "season" (each season lasts 110 days), the game boasts over 800,000 users from almost every country on Earth.

The game has examples of the following tropes:
 * Bribing Your Way to Victory: Hattrick Supporter gives you a lot more stats and the ability to actually see your players and give them custom jerseys, but you don't need it to actually play the game.
 * Death Is Not Permanent: But firing is.
 * Endless Game: Well, except for the seasons, just like real football.
 * One Stat to Rule Them All: Although reduced in later seasons, early on the team that had the stronger midfield usually won, meaning that the Playmaking stat was pretty much the only one that mattered.