Remathilis
Legend
Goodman Games did these GSL-less products in 2008-2009 while the GSL was still in limbo. They changed over to GSL when it was finalized.
That said, They did it using the OGL and SRD, just changing the math to reflect 4e's math and not explaining the change. For example, a Goblin might have a +1 reflex in the SRD, but his Reflex "save" was printed as 13 in the 4e-compatible modules.
That said, If I was designing a GSL-less OGL module, I'd do the following.
1.) Avoid ANYTHING mentioned in the PHB and assume your audience knows how to play and use the basic rules.
2.) Use only things discussed in the SRD. You can do dwarves, elves, even tieflings, but dragonborn and warlords are a no-no.*
3.) Monsters cannot be reprinted "as is". You can't use a Goblin Cutter from the Monster Manual, but you could make a Goblin Slicer with similar (tweaked) math.
4.) Believe it or not, Pathfinder could be your friend for expanding the SRD out. Not sure how it would work with the PF licence.
*You can use Dwarf, Elf, Gnome, Halfling, Half-elf, Human, Half-orc, and Tiefling no problems. Eladrins (as monsters) don't appear in the SRD as monsters, but are referenced in the Summon Monsters summon list, so use as your own risk. Dragonborn is out, but I think there was a copyright challenge to it so I dunno. The 11 PHB classes, + Invoker (pulled from wizard) and Psion is open. You MIGHT be able to use Warlord, Warlock, Shaman, and Avenger due to common use of these words, but I'd be really careful with them.
IANAL, btw.
That said, They did it using the OGL and SRD, just changing the math to reflect 4e's math and not explaining the change. For example, a Goblin might have a +1 reflex in the SRD, but his Reflex "save" was printed as 13 in the 4e-compatible modules.
That said, If I was designing a GSL-less OGL module, I'd do the following.
1.) Avoid ANYTHING mentioned in the PHB and assume your audience knows how to play and use the basic rules.
2.) Use only things discussed in the SRD. You can do dwarves, elves, even tieflings, but dragonborn and warlords are a no-no.*
3.) Monsters cannot be reprinted "as is". You can't use a Goblin Cutter from the Monster Manual, but you could make a Goblin Slicer with similar (tweaked) math.
4.) Believe it or not, Pathfinder could be your friend for expanding the SRD out. Not sure how it would work with the PF licence.
*You can use Dwarf, Elf, Gnome, Halfling, Half-elf, Human, Half-orc, and Tiefling no problems. Eladrins (as monsters) don't appear in the SRD as monsters, but are referenced in the Summon Monsters summon list, so use as your own risk. Dragonborn is out, but I think there was a copyright challenge to it so I dunno. The 11 PHB classes, + Invoker (pulled from wizard) and Psion is open. You MIGHT be able to use Warlord, Warlock, Shaman, and Avenger due to common use of these words, but I'd be really careful with them.
IANAL, btw.