combat system

plot system

inventory system / global leaderboards / dev products / gamepasses / data stores / shop system / sell system ....

map voting / pvp / item giver / win, loss logic / rewards / stats

Character spawning and rarity system

Advanced enemy npc ai + npc class system

yeet system / vfx / cutscene and more
this is a client side system

wall climbing + wall ledge + vaulting

fps system (not polished yet)