Match Challenges is a new feature in the game, added in v0.4, few weeks ago. These challenges activate only in tournament matches and give you additional fame points for performing some specific tasks during a match (more fame = better position in leaderboards). Some challenges are easy, some are hard and there are nearly 30 of them already and more will come in future.
Example challenges already included in the game:
- Obtain 30% slide tackle accuracy
- Dribble for at least 15 seconds without losing the ball
- Hit at least 2 opponents with a single slide tackle
- Score a goal by dribbling past the goal line with the ball
- Cancel a shot using the ball magnet
- Many more...
They work similarly to achievements (in development), require doing something non-trivial, but also not something extra-tricky. They need to be feasible in higher difficulty levels too.
If you have any ideas for any new challenges you can share them on Kopanito's forum prefixing discussion's title with [Challenge]. The best ones possibly will be featured in the game in future.
http://store.steampowered.com/app/399820/