Just wanted to see in log and .flg when I finished the game record about my character:
"He was an eternium man!" or other similar message about other challenge games.

Winning a challenge game can increase final score because its definitely more difficult.

For those who played ADOM too much and they are tired of just finishing the game normally challenge games are solution. Most of them became too difficult since tons of exploits are closed. I think game should have some minor support of them.