Painslayer

Painslayer is a gameplay mod for the GZDoom source port by Jekyll Grim Payne (aka Agent_Ash) that faithfully recreates several important facets of the  video game. Since Painkiller gameplay has significant differences compared to classic Doom, Jekyll needed to overhaul both the player's arsenal and movement. He also recreated the Tarot Card system of Painkiller.

Released in 2021, it has been praised for its high quality and fidelity to Painkiller. It won a Cacoward that year.

Features
Painslayer is a gameplay and weapon mod that aims to be compatible with any map and any monster sets, be it vanilla enemies or monster packs. As such, it doesn't come with any monsters, and the various gameplay aspects, while inspired by Painkiller, are tweaked to work in Doom. Painslayer heavily utilizes ZScript to achieve various technically complex effects.

Some of the key features are:


 * Painkiller Weapons: Almost every weapon includes a primary attack, a secondary attack, and a tertiary combo attack The weapons are faithful recreations of the weapons from Painkiller and its successful add-on Painkiller: Battle out of Hell, with some tweaks to power or mechanics to increase their usability and make them feel more or less balanced on Doom maps against Doom enemies.


 * Black Tarot Cards: at the start of a map (or at a press of a dedicated key; configurable) the Black Tarot Board opens, where the player can purchase and equip up to 2 Silver Cards (they provide unlimited passive bonuses) and up to 3 Golden Cards (they can be activated once per level and provide very powerful bonuses for a short period of time). The cards can only be equipped once per map, after which they become locked in their slots, although they can be unlocked for extra money. In contrast to the original game, where the cards were unlockable by completing map-specific challenges, in Painslayer they can be simply bought for gold.


 * Gold: Used to purchase Black Tarot Cards. Gold can be obtained from breakable crates and explosive barrels, by gibbing enemies, and it also spawns dynamically in any sectors marked as secret areas on a map. Like in the original game, enemy corpses can also be juggled with Killer (the secondary mode of the first weapon), which makes them drop gold.


 * Souls: There are no health kits (medikits and stimpacks are replaced with various ammo pickups); instead killed enemies despawn after a short time and leave a soul behind. Taking a soul will heal the player; the amount healed varies between 1 and 20, based on how much health the monster originally had. The only traditional health pickups are Gold Soul (gives 100 health) and Mega Soul (gives 200 health and 200 armor), which serve as a Soulsphere and a Megasphere replacement respectively.