RPG-like power / skill development

Apocalyptic, dungeon conquering
Modern world with magic / abilities

Reincarnated: ♾ (multiple individuals)
Setting: western fantasy (game-like)
Add'l setting: world-saving
Whole class died from explosion, mc wakes up as a weak spiderling in a world with game-like settings such as dungeons, skills, evolutions and even mecha development. Follow as she discovers the workings of the game-like system and the truth of the world

♀ protagonist
Settings: Fantasy western, game-like
Add'l theme: game-like skill levelling and development, adventurer's guild

♂protagonist
Setting: fantasy western, game system influence
Add'l theme: dungeon-making, survival of the fittest, mc became a bug / glitch

♂protagonist
Setting: fantasy western GAME-LIKE system influence
Add'l theme: reborn as a non-human, slime mc, other races present, territory development of a non-human/demi country, adapted from webnovel