Steal THIS from Delta Green RPG
- vaseodin
- Mar 23
- 4 min read
Updated: Mar 25
by Vasilie Odin Crisan
Phase II x Deimos Infinitum Published March 17, 2026
Your player just rolled up their fifth mercenary with a tragic backstory. They have stats and equipment, but when you ask what their character cares about, they just shrug. Delta Green, the cosmic horror TTRPG from Arc Dream Publishing, has a simple and brilliant mechanic… and it fixes this problem in a very elegant way.
What Are Bonds?
In Delta Green, Bonds are a numerical representation of a character’s most cherished relationships. When they make their agents, players choose a number of bonds based on their profession and each bond starts with a score equal to the agent’s Charisma score.
Here's the genius part: Bonds serve two functions. First, characters can "burn" Bond points to prevent sanity loss after traumatic events (called ‘projecting to a bond’), representing the character’s ability to continue on with their mission as they think about the things they care about most. Second, as characters descend into darkness through repeated exposure to horror, their Bonds naturally deteriorate. The monster hunter starts to lose their humanity and their connection to their spouse. The secret agent missed his daughter’s recital one too many times. As the agent is exposed to horrible truths about the world, their connection to humanity begins to fade.
The mechanic tends to impact players more than having to make death saves. Your character might survive physically, but watching those Bond scores tick down to zero shows you the cost of knowing what humanity was never meant to learn.
Something in the Water is an adventure for 5e that delves deep into madness... check it out!
Why This Works at the Table
Most RPGs treat backgrounds as creative writing exercises. Players write pages of backstory that may never come into play. Bonds change this by making a character’s connection to their backstory matter from the very first session.
It’s a funny thing, but attaching numbers to a character’s bonds suddenly makes them care deeply about them. You may notice your players talking about their character’s life outside of adventuring. They may think twice about making certain decisions purely based on how it will affect their bonds. A player might turn down a dangerous mission because they just burned their last Bond point with their daughter, and they can’t bear the thought of losing that connection entirely.
The mechanic also gives you, the GM, built-in story hooks. Those NPCs are named individuals with mechanical weight, so use them! When you bring a player's Bond into the narrative, it matters. And the stakes become personal without the need for planning elaborate subplots.
Adapting Bonds to Your Game
The beauty of Bonds is how flexible they can be. You don't need cosmic horror to make them work.
For fantasy games: Bonds represent ties to normalcy. When adventurers spend months in dungeons, those connections begin to fall apart. The PCs must use downtime to restore them. It’s a great way to make downtime activities more meaningful.
For superhero games: Bonds are the hero’s tethers to their secret identity. Every time Spider-Man chooses fighting crime over Peter Parker's life, one of his Bonds suffers.
For heist or espionage games: Bonds measure what characters are doing this for. Retirement dreams, family obligations, old friendships, or something more personal. Losing Bonds means losing purpose.
The framework adapts to any system. Give players points at character creation (Delta Green uses an agent’s Charisma score, but any stat works). Have them distribute points among 3-5 specific people or groups. Then create situations where Bonds provide a mechanical benefit at the cost spending points.
Making It Yours
You don't need to copy Delta Green's sanity mechanics. Instead, Bonds can affect another relevant mechanic. In D&D, players may be able to spend Bond points to gain advantage on a roll, or to reroll a death save. In Blades in the Dark, it could be used to reduce stress. The key is making Bonds mechanically useful enough that players want to preserve them, but regular gameplay is constantly threatening them.
Also consider if, how, and when Bonds restore. Delta Green intentionally makes this extremely difficult, but in your game you might let players to recover Bond points through downtime activities. Whatever you do, don’t allow Bonds to recover with a simple long rest.
The Real Magic
Bonds give players a reason to care about the world beyond treasure and loot. Adding a Bonds mechanic allows your players to collaborate in the story your group is telling without requiring elaborate backstories and NPCs. Even better, they make character death even more impactful. When a character dies with strong Bonds intact, everyone in the group will feel the real tragedy of the loss. When a character dies with all their Bonds at 0, you may have told a tragic story of someone who chose to lose it all for gold, glory, or vengeance.
Steal this mechanic. Your players' next characters will thank you.
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