TL;DR
- Hell Knight Toy requires shield-bashing a hidden wall in the cathedral’s second floor hallway
- Nightmare Accelerator Skin is accessible before the point-of-no-return via rooftop ramp access
- Sentinel Barracks Codex Entry is found beside the upgrade shrine in the final arena area
- Level 4 contains exactly three collectibles: one toy, one weapon skin, one codex entry
- Strategic exploration prevents missing collectibles before progressing through key checkpoints
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Doom: The Dark Ages presents players with an expansive campaign featuring numerous levels filled with demonic adversaries, hidden secrets, and powerful armaments. Among these concealed treasures are three distinct collectible categories: codex entries that expand lore, miniature toy figures, and weapon customization skins. Level 4 specifically contains exactly three such items positioned strategically throughout the Sentinel Barracks environment.
For comprehensive coverage of all levels, consult our Complete Guide to ensure you don’t miss any crucial game elements.

The Hell Knight collectible figure is strategically positioned within the initial segment of the Sentinel Barracks level. Players will encounter a cathedral-style structure early in their progression, requiring navigation through an interior corridor, exiting to the rear to circumvent to the upper level, then re-entering from the opposite direction. Upon initially accessing the second story, the game directs you toward a passageway heavily guarded by shield-equipped enemies.
Before advancing through this heavily defended corridor, carefully scan the left wall for a destructible section identifiable by subtle visual cracks. Execute a shield bash maneuver against this vulnerable surface to breach it, revealing a concealed chamber where the Hell Knight Toy awaits collection.




During the concluding segment of Level 4, players engage in an extensive exterior combat sequence requiring successive shield-assisted jumps across interconnected plazas while confronting enemy forces. Approaching the conclusion of this outdoor section, you’ll encounter a definitive progression marker indicating an irreversible descent point. Before committing to this descent, identify an adjacent structure accessible via an inclined ramp along its side.
Ascend this ramp to reach the building’s rooftop, where the Nightmare Accelerator weapon skin awaits discovery. This cosmetic enhancement significantly alters the visual appearance of your acceleration weapon, providing both aesthetic customization and collection completion benefits.


The third and final collectible in Level 4 is a Sentinel Barracks codex entry, positioned immediately preceding the level’s conclusion. Your progression will eventually lead to an arena-style combat zone featuring an upgrade station immediately outside its entrance. While the arena itself represents your primary objective, venture to the side of this enhancement shrine where a collapsed section permits access to a secluded area.
Within this hidden alcove rests the codex collectible, which provides valuable narrative context and background information about the Sentinel Barracks location. Collecting all codex entries throughout the game unlocks additional Weapons Unlock opportunities and deepens your understanding of the game’s lore.


Successfully acquiring all Level 4 collectibles requires strategic awareness and systematic exploration. Allocate approximately 15-20 minutes specifically for collectible hunting within this level, accounting for combat encounters and navigation challenges. Common errors include progressing past the point-of-no-return marker before securing the Nightmare Accelerator Skin, or failing to identify the subtle visual cues indicating breakable walls.
Optimize your approach by thoroughly scanning each new area before engaging primary objectives, particularly in cathedral interiors and outdoor plaza sections. The systematic approach to Class Guide selection can significantly impact your collection efficiency through specialized mobility or detection abilities.
Advanced players should prioritize the Hell Knight Toy immediately upon reaching the second floor to avoid backtracking through enemy respawns. Remember that collectibles persist between deaths, allowing focused acquisition without permanent miss opportunities.
Action Checklist
- Locate breakable wall in second floor hallway before shield enemy engagement
- Collect Hell Knight Toy from behind destroyed wall section
- Before point-of-no-return jump, ascend building ramp for Nightmare Skin
- At final arena, explore destroyed area beside upgrade shrine for codex
- Verify collection completion before ending level progression
No reproduction without permission:SeeYouSoon Game Club » All Sentinel Barracks Collectibles In Doom: The Dark Ages Complete guide to finding all three collectibles in Doom: The Dark Ages Level 4 with expert strategies
