My game would have the following traits
High verisimilitude especially in combat like GURPS or Unisystem
Quick Life path character generation with reasonably simply skills and a non lifepath option
A solid bestiary with the common monsters
Two magic systems, 1 like True20's psychic system and the other like Ars Magica
Quite detailed equipment lists
Vehicle , Outdoor and Chase rules
fantasy, modern/urban fantasy and SF support and maybe post apoc support.
So a cross between Melanda, Beyond the Wall and Unisystem basically
The Return of Planescape? - Curious. There is a brief note on this 'countdown' at Enworld.
15 hours ago