In Doom: The Dark Ages, Rubies are rare collectibles used to upgrade weapons, shield, and melee abilities at Sentinel Shrines, enabling mid-tier enhancements. Found in secret areas, puzzles, or guarded by enemies, they glow red on statues.
Upgrades that require Rubies
- Combat Shotgun - Tune Up (The Combat Shotgun fires in rapid, three-round bursts) / Flare Up (The ombat Shotgun instantly applies Burn to fodder demons) - 1 Ruby
- Super Shotgun - Shatter (The Super Shotgun deals increased damage to armor) - 3 Rubies
- Shredder - No Frills (The Shredder's rate of fire is increased) - 1 Ruby
- Impaler - Salvage (Picking up Impaler ammo dropped as a result of yuor Melee and Shield attacks empowers your next shot) / Chronospike (Holding [LMB] slows down time. Impaler projectiles fired during slow time deal more damage) - 2 Rubies
- Accelerator - Heatblast (Releasing [LMB] at maximum Charge fires a damaging Heatblast that consumes all remaining Charge. Demons killed by Heatblast drop Accelerator ammo) / Mega Cell (The time it takes for the Accelerator to lose Charge is increased) - 1 Ruby
- Cycler - Fulmination (The duration of Shock applied by the Cycler is increased. Additionally, killing a Shocked demon with the Cycler generates more lightning arcs) - 2 Rubies
- Pulverizer - Runic Strike (Melee strikes now build and maintain Charge) - 2 Rubies
- Ravager - Ignition (The Ravager takes less time to reach maximum fire rate and the movement penalty while firing is removed) / Slow Burn (The Ravager's maximum rate of fire is increased but it takes longer to achieve. The movement penalty while firing is more significant) - 3 Rubies
- Chainshot - Gravitational Flux (The Chainshot deals more damage to armor at maximum Charge) - 3 Rubies
- Grenade Launcher - Rupture (Direct hits with the Grenade Launcher drop Cluster Grenades when hitting a demon affected by the Shield Saw) - 3 Rubies
- Rocket Launcher - Cooked (Parrying a Hell Surge projectile empowers your next shot) / Blood Sacrifice (Rocket Launcher projectiles deal increased splash damage at the cost of more self-damage) - 3 Rubies
- Shield - Harvester (Killing multiple fodder demons with Shield Throw will empower your next Shield Charge, allowing it to deal increased damage to the primary target) - 1 Ruby
- Shield - Blade Master (The stun duration of the Shield Saw is increased) - 2 Rubies
- Power Gauntlet - Encore (Your Power Gauntlet combo gains a 4th hit. This additional swing is only accessible when acquiring a melee charge from a parried attack) - 1 Ruby
- Flail - Engulf (Every Flail strike also scorches nearby demons and causes them to drop armor) - 2 Rubies
- Dreadmace - Riposte (Successfullyparrying a Hell surge attack when the Dreadmace is charged will grant you an additional Dreadmace attack. This bonus swing is available for a limited time. This effect cannot be triggered again for a short duration) - 3 Rubies
