Sky pirates - game about highjacking santa's sleigh mid-flight - thieves who bungie-jump from hot air balloons - using flying drones to physically access servers to steal software

Teleportation - portal-like - game about managing travel, airport-like facility with teleporters - racing game with portals as shortcuts, need to set one portal on first lap, other on second, use them on third

Tunnels - dig dug remake - exploring abandoned subways/sewers - surfing/racing through a sewer?

Space is limited - play as a Tron-style program that has to delete junk files, avoid accidentally deleting important ones - a game where the level gets smaller - managing limited resources on a spaceship

You are the power source - endless runner on a treadmill, hampster wheel, to generate power - game about manipulating politics (political power) - Matrix referece?

Overgrown - a game about killing giants/titans - lawn-mowing simulator - a game where you have to collect a lot of food, and eventually need to roll instead of walk

Crossroads - traffic management game - small metroidvania with central area - frogger style - race game where every light is red and you have to run them, avoid traffic

Repair - robot needs to repair itself to regain abilities - pit-stop simulator - puzzle game about IT worker rapidly fixing coworkers computers, Warioware sytle

Branching out - social/career networking simulator - game about trees?

Momentum - bus with a bomb on it - vehicle with no breaks - ski jump - build speed to launch player into destructible level

A single resource - steampunk survival, water is used for drinking and energy - research game were you have to find answers to trivia using only wikipedia

Strength in numbers - pikmin style, recruit animals to help you - realtime strategy were you depend on cannon fodder

Decay - of course, Zombies - urban decay, crime in the slums

Treasure Map - any action/adventure involving treasure hunt - you need to explore an area and mark points of interest on a map, to sell to tourists

Fill the void - lemmings style, build a bridge of whatever before dumb creatures walk off cliff - constantly having to feed a perpetually hungry person/monster (wendigo?) - dating simulator, fill the void in your life

Combine - combine two genres - mad scientist splicing genes - food-preparing game, pizza maybe?