This version is what its title says, a desktop variant of Original PD, developed by Watabou himself. Nevertheless, Watabou has not updated it since he first released it in collaboration with Arcnor and it is still based on version 1.7.2a of August 2014, so this is a pc-exclusive alternative for the haters of degradation, as degradation was implemented in version 1.7.4, but also it is rather old. Therefore it lacks important features of current Original PD (for a full list of the changes made after 1.7.2a you can visit this link):
Auto-aiming of enemies with ranged weapons and wands is not available.
Same wands don’t merge.
Tengu does not drop a Tome of Remastery if the class has already obtained the Tome of Mastery in a previous run.
The Berserker perk: "The more enemies surrounding the Berserker, the faster he performs his attacks" is missing.
The Sacrificial Chamber and the scroll of Wipe Out don't exist.
The second quickslot doesn't exist.
The bomb and honeypot items are missing.
The wand of Telekinesis is still available and is not replaced by the wand of Reach.