Does anyone have experience on running two systems simultaneously? I want to inject dungeon crawls with investigative mysteries and the prospect of characters going insane. I figured CoC and D&D would be a good place to start, because I want to move toward a bigger idea I had but need practice.
>>97830819I've done exactly what you're talking about in GURPS and it worked beautifully. Also, since CoC is a BRP system, you should look to something like Mythras to integrate dungeon crawling into your game.Basically, D&D doesn't belong here.>Not everything has to be D&D. It's not appropriate for many, many types if games. Broaden your horizons.
>>97830819I ran a game based on the Persona videogames a while back. I used Kids on Bikes to simulate the investigations and free time in reality, letting my players do side stuff to get temporary buffs to their D&D characters. Then once they had discovered the next target/dungeon We switched to D&D where their characters were their Personas and they ran through the dungeon. It ended up being every other week we would switch systems; a week investigating, a week dungeoning. It worked well enough, but I'm sure there's another singular system that could do it both without the need to homebrew so much. I think I would try to stick to one system in the future though. In your case, Maybe something like Arkham Horror RPG covers both the combat and investigation better than the two systems separated.
>>97830819> SimultaneouslyNo. But I have homebrewed a system that's a mix of two. And I have had a game where two different core mechanics were used alternatively.What you describe seems to be the first one. What I would do is find a core system that does what you want your heroes to do most of the time. Kill monsters, open trapped doors, etc. Make sure it needs the least alterations possible, so if you are going to go the Eldritch Horrors' way, no DnD/PF/DH for a game in the 1950s. For a game more like Darkest Dungeon, you go full steam ahead.Then, you find a game that does the mechanics you wanna tack on it the best, and do just that. IDEALLY, for the sake of consistency, you try to blend the two.So let's say you want a Darkest Dungeon game, you may want convert PF 1st to introduce CoC elements, you should use CoC horrors and Sanity, but instead of having a Sanity stat, you could alter Wisdom to serve there.What you could do is multiply a character's Wisdom Score by 5% to obtain a Sanity score that should range from 40% (nat 8) to 90% (nat 18). When a character takes Sanity damage, for each 5% hit, the character takes 1 Wisdom damage that can only be healed with downtime, exactly like the CoC rules tell you. When a character takes X hits, it can receive temporary insanity the same way. And learning Eldritch (or even just Arcane) spells erodes one's sanity.
