kronovan
Adventurer
I'm by no means system monogamous, but there's limits to how system polygamous I am. I tend towards homebrewing, so my preference is universal gaming systems. That said, of the 10 or so TTRPGs I own, despite giving them a college try, none of them have proven adequate for every genre. My current universal games systems and preferred genres for them are:
- SWADE - Use it for all Pulp subgenres, Cyberpunk, Steampunk, Dieselpunk, Action-Horror, as well as Military SciFi, Sword & Sorcery and Historical Fantasy which have a strong cinematic vibe.
- BRP/Mythras - Use it for all Historical Fantasy, Horror and Sword & Sorcery when I really want to turn up the grit (love Mythras for this.)
- CoC 7 - not so much of a universal system for me, it's the only TTRPG I now use for Lovecraftian/Cosmic Horror.
- True20 - Use it for Fantasy-SciFi and Epic/Heroic Fantasy settings and homebrews I originally brewed for d20. As well, with wounds instead of HPs and the frequent anxiety of Toughness saves Vs Damage, I've also found (via Shadows of Cthulhu & its sanity rules) that it can adequately support Cosmic Horror.
- 13th Age - Use it for any setting that was written for any flavor of D&D, including 1 of my own homebrews. Homebrewing monster/NPCs is IMO far from easy with the system, but reskinning is doable; just a challenge if a similar threat isn't available via some 3rd party settting.
- Traveller/Cepheus Engine - use them for Military SciFi, Hard SciFi, Space Opera as well as Sword & Sorcery (Sword of Cepheus) where the party of PCs will start as more seasoned. The knock against both is that its a big time sink to homebrew custom Careers. CE with its ever growing list of 3rd party settings though, is helping by giving career examples to milk & borrow from.
- 2d20 - While I've given a few of Modiphus' settings a try, my players and I have only liked it for Star Trek Adventures.
- AGE - I have my own MidAGE hack which combines elements of Fantasy Age with Dragon Age. I brewed it up to better support the AGE appendix in the original Midgard Campaign setting book and to smooth out some rough edges in DA. I've also used if for a DA campaign which went well. I own the Modern Age and Expanse books, but have only run 1-shot adventures. ModAge's concept of modes though is IMO worth the price of purchase; also has other good features among its pages.
- ICONS - Now using it for any Supers subgenre.