- Estimated achievement difficulty: 2/10
- Offline: 14/14 
- Online: 0/14 
- Approximate amount of time to 400: 10-15 Hours
- Minimum number of playthroughs needed: 1 Full and Many Partial
- Missable achievements: 9, but you will need multiple playthroughs
- Does difficulty affect achievements: No Difficulty Settings
- Unobtainable/glitched achievements: None
- Extra equipment needed: No
Abyss Odyssey is a platformer where you are fighting the creatures dreamed by a dangerous warlock on your quest to defeat the warlock. You will need to fight your way down a path of many rooms that have three different levels of difficulty.
Dying in the game or beating the Warlock will send you back to the beginning with all the gold and experience that you collected during your run but not your weapons and items. It is also not possible to save in the middle a run, so you must beat the Warlock in one sitting.
Start a local game. During your first playthrough, you should focus on defeating enemies and gaining some experience. After you have gained some experience you should try and go through the entire dungeon and defeat the Warlock. On the way you will defeat the Nightmare version of one of the main characters, this will unlock the Ghost Monk for future playthroughs.
After defeating the Warlock you should focus on the boss and miscellaneous achievements. Panganini and Verbum Dei are marked on the map by a violin and demon head. The shopkeeper can be found on many levels near the alters or behind breakable walls. Before defeating the shopkeeper you should check his inventory and buy souls and health potions if you need them. The Living Creature is randomly found above ground after you exit the Limbo world that you enter when you defeat the Warlock or die. The golden room on the map has a fountain where you can donate money to unlock the Pincoya.
After you have the different miscellaneous achievements you should focus on leveling each character to at least level 26. This will take about two and a half playthroughs per character. You should also make sure that you attack every shopkeeper you encounter while doing this. Once you have got to this level, find an alter and max out the attributes of three different special attacks.
You will need to acquire at least one soul greater than Level 10, Level 25, and Level 40. You do not need to capture the soul, you can also buy it from the shopkeeper or pick it up while in a multiplayer game.
You can only capture monsters that are the same level as you or lower. Once this requirement is met you need to have a max mana bar and then use your + attack on the monster. After you defeat the monster it will drop its soul for you to pick up.
You can also gain souls by defeating the rooms that have a question mark on them in the map. If you defeat it the soul of the monster you used will appear near the entrance of the room you next appear in. Unfortunately the soul is usually not placed in a location where you can pick it up.
Abyss Odyssey is a fun game that offers a few hours of enjoyment. The achievements are also rather easy to obtain and shouldn’t pose much a challenge to anyone that tries to get them.
[XBA would like to thank exit9500 for this roadmap]