Here is the full list of all 24 Penarium achievements.
Smash 150 barrels in a single arcade game in any arena.
die 1000 times.
Complete the third arena in campaign mode.
Beat the boulder madness challenge in the campaign mode.
Collect all 14 cards.
Smash 100 barrels in a single arcade game in any arena.
Die 250 times.
Collect 10 cards.
Collect 6 cards.
Have 5000 coins in your wallet.
Complete the second arena in campaign mode.
Beat the Dragon's Nest challenge in campaign mode.
Have 2500 coins in your wallet.
Complete the first arena in campaign mode.
Beat the first balloon challenge in the campaign mode.
Have 1000 coins in your wallet.
Die 50 times.
Smash 50 barrels in a single arcade game in any arena.
Beat the first cauldrons challenge in the campaign mode.
Have 500 coins in your wallet.
Smash 20 barrels in a single arcade game in any arena.
Die 15 times.
Die 5 times.
Die by a direct hit from an icicle while in mid air.