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