Rip and Tear: Complete DOOM 2016 Walkthrough for 100% Secrets

DOOM (2016) remains the gold standard for modern first-person shooters, emphasizing relentless aggression and vertical mobility. This walkthrough provides a comprehensive path to finding every secret, elite guard, and collectible across the 13 primary missions. Achieving 100% completion requires more than just shooting skills; it demands a keen eye for environmental puzzles and a mastery of the "Push Forward Combat" loop.

The Core Mechanics of Hell

Survival in the UAC facilities and the plains of Hell depends on the Glory Kill system. When enemies stagger and glow, a melee execution drops health and ammo. This is the primary resource loop. Standing still is a death sentence. To master the game on higher difficulties, movement must be constant, utilizing double jumps and ledge grabs to outmaneuver the demonic horde.

Mission 1: The UAC

The game begins in the sarcophagus room. After clearing the initial possessed, the first priority is the Praetor Suit.

Secrets and Collectibles:

Combat Shotgun Mod: Found early via the first Field Drone. The Explosive Shot is generally recommended for early crowd control.
Collectible 1 (Blue Guy): Located behind the combat tutorial area. Look for a small ledge to climb after the first encounter.
Classic Map Lever: Hidden near the exit to the exterior. Pull the lever and backtrack to find the pixelated corridor from the original 1993 game.
Elite Guard 1: Found shortly after entering the canyon area, leaning against a rock wall.

Mission 2: Resource Operations

This mission introduces the yellow keycard and the first major power restoration objective. The layout is more vertical, requiring careful exploration of ventilation shafts.

Key Objectives:

Restore Power: Follow the waypoint to the control terminal. Once power is restored, several hatches and elevators become functional.
The Chainsaw: This is located on a walkway in the main warehouse. Use the chainsaw to instantly kill non-boss enemies and replenish all ammo types.
Secret Figure (UAC Marine): Above the control room, jump into the vent system to find a hidden cache containing a collectible.
Rune Trial: The first Rune Trial is found in a curved hallway. Completing "Vacuum" (which increases ammo/health pickup range) is essential for early-game efficiency.

Mission 3: Foundry

Foundry is a non-linear hub level involving three different keycards (Blue, Yellow, and Red). The environment is hazardous due to molten metal.

Tactical Advice:

The Plasma Rifle: Found in the central workshop. It is highly effective against shielded enemies.
Elite Guard locations: There are three here. One is hidden behind a crate near the yellow door; another is at the end of a high walkway over the lava pits.
Secret Argent Cell: Located in a side office accessible only after obtaining the blue keycard. Prioritize Health or Ammo for your first upgrade.

Mission 4: Argent Facility

This is one of the largest maps, featuring wide-open arenas and significant backtracking opportunities.

Finding the Secrets:

Field Drones: There are two drones here. The Micro Missiles for the Heavy Assault Rifle are a top-tier choice for dealing with Revenants.
Classic Lever: Located behind some barrels in the north quadrant. Opening this reveals a classic DOOM map area.
Super Shotgun: Found in the maintenance area. This becomes your primary weapon for the remainder of the game once the "Double Tap" upgrade is unlocked.

Mission 5: Argent Energy Tower

This mission is a vertical climb. Platforming skills are tested here. Falling off ledges is the biggest threat.

Strategy:

Gauss Cannon: Picked up mid-way through the climb. The Siege Mode mod turns this into the most powerful weapon in your arsenal, capable of deleting Mancubi in one shot.
Elite Guards: Look for scaffolding near the middle of the tower. Many guards are hidden on ledges that require precise double-jumping.
Rune Trial - Dazed and Confused: Found near the base of the tower. This extends the stagger duration of enemies, making Glory Kills easier to perform in chaotic fights.

Mission 6: Kadingir Sanctum

Your first foray into Hell introduces a shift in visual style and enemy density. Barons of Hell begin to appear more frequently.

Mastery Tips:

Teleporters: Use the yellow and blue portals to escape traps. Hell Knights will pursue you aggressively; use the Super Shotgun to blast them at close range.
Collectible Figures: One is hidden behind a breakable wall near the third Hell Knight encounter. Look for the yellow cracks in the stone.
Classic Map: This lever is hidden under a bridge. You must jump down to a small ledge to pull it, then use the jump pads to return to the main path.

Mission 7: Argent Facility (Destroyed)

Returning to the facility, the layout has changed due to the demonic invasion. Navigation is more treacherous.

Priority Targets:

Summoners: These enemies should be your first target. Use the Lock-on Burst with the Rocket Launcher to take them out before they spawn too many additional demons.
Rune Trial - In-Flight Mobility: This is perhaps the most important rune in the game. It allows for mid-air directional control, which is vital for late-game boss fights.

Mission 8: Advanced Research Complex

The BFG-9000 is the highlight of this mission. Do not waste its ammo on small groups; save it for the massive arena fights at the end of the level.

Secret Path:

To reach the secret area in the labs, you must deactivate the power cores in a specific sequence (A, C, B). This opens a door to an Elite Guard and a Data Log.
The Auto Map terminal is located in the security room near the start. Activating this reveals all collectible locations on your HUD.

Mission 9: Lazarus Labs

This mission culminates in the first major boss fight against the Cyberdemon. The level itself is filled with occult lore and tight corridors.

Boss Fight - Cyberdemon:

Phase 1: Strafe in large circles. Use the Gauss Cannon (Siege Mode) or the Rocket Launcher. When he fires his barrage, look for the gaps in the missiles.
Phase 2 (Hell): He will create corridors of fire. Use the jump jets to dodge the horizontal beams. Switch to the BFG if he gets too close to reset the encounter rhythm.

Mission 10: Titan’s Realm

Deep in the pits of Hell, this mission features intense, multi-wave arena battles.

Combat Strategies:

Cacodemon Management: Use the Explosive Shot or the Plasma Rifle's Stun Bomb to drop them quickly. A Glory Kill on a Cacodemon provides a large health boost.
Pinky Demons: Never attack from the front. Wait for them to charge, dodge, and then shoot their exposed tail with the Super Shotgun.

Mission 11: The Necropolis

This level leads to the fight against the Hell Guards. It is a gauntlet of the game's toughest non-boss enemies.

Secrets:

The Classic Map lever is located immediately after the battle with the two Barons of Hell.
An Argent Cell is hidden in a fork in the tunnels near the blue skull door.

Boss Fight - Hell Guards:

The first phase is a single guard with a shield. Attack only when his shield drops during his spin move.
The second phase features two guards. Focus on one at a time. The BFG is highly effective at damaging both simultaneously if timed correctly.

Mission 12: VEGA Central Processing

A cold, high-tech environment. The difficulty spikes here as the game throws every enemy type at you at once.

Mastery:

Infinite Ammo: If you have the "Rich Get Richer" rune fully upgraded and your armor is above 75, you have infinite ammo. This is the key to surviving the final rooms.
Elite Guard: The final guard is located behind the central cooling turbine. You must jump across the rotating blades to reach him.

Mission 13: Argent D’Nur

The final mission. There are three "Wraith" locations you must cleanse before facing the final boss.

Final Preparations:

Ensure your Super Shotgun and Gauss Cannon mastery challenges are complete. These weapon upgrades make the final encounter significantly more manageable.
There are two Elite Guards here. Both are located in the final arenas before the "Well" gate.

Final Boss - The Spider Mastermind:

Keep your distance. The Spider has a massive hit box, making it easy to hit with the Gauss Cannon from across the arena.
When she electrifies the floor, jump onto the stone pillars that rise from the ground.
Use the BFG only when she opens her brain case for maximum damage. A direct hit will stun her, allowing for a few seconds of uninterrupted fire.

Optimal Weapon Tier List and Mods

Choosing the right weapon for the right demon is the difference between victory and a quick reload. Based on the 2026 meta for speedrunning and Ultra-Nightmare runs, here is the ranking:

Super Shotgun (Double Tap): Unrivaled for close-range DPS. It kills most mid-tier demons in two bursts.
Gauss Cannon (Siege Mode): The highest single-shot damage in the game. It can clear a line of enemies or stagger a Baron instantly.
Rocket Launcher (Lock-on Burst): Essential for mobile enemies like Summoners and Prowlers.
Heavy Assault Rifle (Micro Missiles): Best for sustained damage against flying targets like Revenants and Lost Souls.
Plasma Rifle (Stun Bomb): A tactical tool. Use it to freeze Pinkies or large groups while you reload or reposition.

Praetor Suit and Rune Optimization

Upgrading the suit and equipping the right runes transforms the Slayer into an unstoppable force.

Praetor Suit Priority:

Environment: Upgrade this first to navigate lava and toxic waste without taking damage.
Dexterity: Faster weapon switching and ledge climbing are critical for maintaining momentum.
Area Analysis: Useful for finding the last few collectibles and secrets.

Best Rune Combos:

Vacuum + In-Flight Mobility + Rich Get Richer: The ultimate build for high-difficulty play. You gain mobility, resource reach, and infinite ammo for your power weapons.
Savagery + Armored Offensive: For those who prefer a melee-heavy playstyle. Glory Kills become faster and drop armor shards, keeping your defenses high.

Final Mastery Tips

To achieve a true 100% completion, always check the Mission Select menu. It displays exactly which secrets, collectibles, and trials you are missing for each map. If a combat encounter feels too difficult, remember to swap mods; the game allows you to change your weapon's secondary fire on the fly.

Focus on the challenges. Every mission has three unique combat challenges that grant weapon upgrade points. Completing these early ensures your arsenal is at maximum strength before you reach the late-game corridors of the Advanced Research Complex and the final descent into Argent D'Nur.

By following this walkthrough, the demons of Hell stand no chance. Keep moving, keep shooting, and never stop until the last gate is closed.