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