SINISTER SANCTORUM boasts a wide variety of mechanics.
Read below to learn all about them.

The shop becomes available after each wave end. The shop offers items, weapons and spells.
Not only does the shop offer those, it also offers a reroll and ammo refill.

The reroll changes out every item in the shop for a new item.
The ammo refill refills the ammo of the purchaser.

SINISTER SANCTORUM offers entirely new custom items to empower the player. Items can vary from damage increases to entirely new effects such as lightning strikes. Items are stackable and allows you to change up your playstyle.

Items are available in the shop and become more common in the high wave counts.

Spells, the main source of Sorcerers are available in SINISTER SANCTORUM. Spells are a one time use and can be a huge game changer.

Spells are available in the shop.

SINISTER SANCTORUM features a custom health regeneration system. Be wary, as you may be more vulnerable than you might imagine.

Health and health regeneration can be affected by items.

Below your health bar, a green bar will be available. The green bar is "Mayhem" - a constantly degenerating bar that when filled will buff the player. Kill and keep up the Mayhem! When filled, you'll gain increased fire rate, reload speed and double the score gain.

Mayhem and Mayhem degeneration can be affected by items.

Quick Revive is not available - as a substitute, SINISTER SANCTORUM offers a solo downing system. When being downed, you'll be killing all Zombies currently alive in the map.

You only have 3 downs, 4 strikes and it's game over.