Here is the full list of all 30 The Waste Land achievements.
Collect all the upgrades and all the weapons
Finish the game with an act of courage
Finish the game with an act of trust
Defeat the last boss
A blade of incredible powers
Talk, understand, think
Find 20 heart power ups
Find the final arrows set
Strange things may happen..
Defeat a flying boss
A sword with peculiar qualities
Defeat a snow living boss
Find 15 heart power ups
Find some powerful arrows
There's an hidden crypt full of secrets
Find 10 heart power ups
Find a blade from a distant land
Defeat a sea dwelling boss
Find 5 heart power ups
Find the explosive arrows
Enter the credits level
Ancient monuments sometimes have an hidden entrance
Find the battle sword
Find the fire arrows
Defeat the first boss
Pierce through enemies with your bow
Find the double jump boots
Follow your fate
Find the short sword
Start a new adventure