So I decided to make another idea for each of the final round themes! I tried to be a bit more realistic here, though.
Summoning: Cozy game where you summon little demons to help with daily tasks.
It spreads: You're an alien pod people boss and have to manage the invasion: order minions to replace others, you have to separate them and clone them in secret.
Recycle: Collect the healing potions and other consumables left by the adventurers and upcycle them and sell them in your shop.
Tunnels: First person tile-based game where you explore a tunnel network and have to find places that correspond to the overworld above.
Strange machines: Machines litter the landscape, figure out what their parts do and switch them to complete puzzles.
Single use: Action RPG but the weapons break after one hit. However, you auto-equip the next item from the inventory, so inventory management becomes key to survival.
Strength in numbers: Strategy game where you build buildings and the strength value of each building is the combined value of its neigbours. The values can also be negative, or multiplications or divisions. Each new building is chosen for a small randomly selected set.
Fishing: 3rd person arcade action: play as an orca and take down as many fishing boats as you can. The fishers start using increasingly aggressive weapons as the game progresses.
Push your luck: Simple dungeon crawler, room by room. After each encounter, you can decide to either go home or continue onwards. Rewards increase exponentially, but your resources dwindle.
Digging: Graveyard manager, dig graves for recently deceased, but you have to consider how they rise up, zombies and vampires just don't mesh that well.
Cartography: You have a map marked with some hotspots. Explore the locations and choose the correct explanation for the place.
Pick your poison: Very simple roguelite gameplay with short sessions, but before each run you pick an item that has both an upside and a downside. Could be bar-themed.
Decay: The city decays before your eyes. Bridges and walkways disappear. Collect cultural relics before paths to them disappear.
Collapse: 2D platformer where you jump on platform to collapse them on enemies.
Mutation: You're a monster farmer and clients come to you with different requests. Combine random mutations to complete orders.
You don't play as the main character: Escort quest where you are the one being escorted.
