Similarly, I'd love a RPG set around NE Egypt, the southern Levant and the Arabian peninsula in about 1917, with British-occupied Cairo being the hub and the bedouin tribes and geopolitical factions (Ottomans, US oil, British, French) as game-altering players. The game would be single-player with occasional companions, movement is real time and combat is TB similar to Silent Storm, with fully destructible environs and sound localization for NPCs outside of LOS. Combat would occur in the same map as the rest of the game - no jRPG style combat maps. Travel on the worldmap would be similar to Fallout 1, with random encounters and locations either discovered through serendipity, dialogue or the odd map. Quest design would be be focused on multiple skill-paths similar to Fallout 1, with combat-heavy maps designed for different skilled pathways similar to Underrail. The player can annotate local maps similar to BG2, there is a Quest Log similar to the IE games, with no quest compass or screen pop-ups. The UI would be skeuomorphic (think Indiana Jones), the perspective oblique-cavalier, with likely AOD's style of camera control. Player inventory is a grid, with item weight and volume restrictions similar to
Neo Scavenger, including the ability to expand capacity via bags. There would be an IE style paperdoll, with approximately that many item slots. The main game world interface has a fixed combat log, and all conversations can be reviewed after the fact. The art style would be pulp 90s style take on the era and location, with the silly levels of violence present in Fallout. There might be light scifi, at the late stages of the game.
The character system would be classless, so your character's abilities are entirely driven by stats, gear, perks, quirks and flaws. A combination of SPECIAL and Arcanum - which is pretty well approximated in
Hackmaster 4e. Primary attributes are not rolled, but allocated out of a fixed pool (SPECIAL style). There is a pool of building points (BPs) that you can use to tag and increase skills and modify attributes. Your BP pool can be increased by random (greater BP value) or specified (less BP value) selection of physical flaws and mental quirks, such as weakling or agoraphobia. Depending on the skills tagged, an entirely optional list of CYOA 'splat-book' style scenarios can be played out near the end of character creation, which can modify everything from attributes to skills to starting gear and quirks/flaws. There will be at least a 50% chance that the results of this are bad. Perks are available every X levels, and rarely for the completion of quests. There would be pre-made "Fighter / Thief / Talker / Engineer" characters that can be selected to jump into the game (with or without manual tweaking), or even all-encompassing stat/skill/quirk/flaw templates that can be applied to the character creation screen as a starting point, and then modified. Final characters can be saved as new templates to tweak in the future as well.
Quasi-historical, WW1 Cairo, TB combat, classless with deep character abilities and Fallout 1 / Underrail sensibilities. With destructible structures. And no romances or crafting (maybe Cromwell-style item upgrades..).