Excited to be taking part in this boiz! Let us know what software you feel like using!
Good Luck GAMERS
Some good free engines & resources:
Clickteam Fusion 2.5 Free Edition - simple visual programming engine for 2D game development, the free version is pretty robust
https://www.clickteam.com/clickteam-fusion-2-5-free-edition
------
Bitsy - super simple 2D engine, great for making short adventure games. Runs in browser! Even on mobile!
------
Adventure Game Studio - fleshed out software focused on streamlining the creation of point and click adventure games.
https://www.adventuregamestudio.co.uk/
------
Godot - like Unity and GameMaker Studio had a baby - suitable for 2D and 3D. Takes a little learning (although lots of Unity knowledge is transferrable) but is very popular and ~open source~ (runs on Linux too, for those of you that care)
------
Unity Flatgame Maker - free plugin to allow for easy development of Flat Games, which you should definitely look into if you have no idea what that is.
https://dreamfeel.itch.io/flatgame
------
Literally anything - there are no rules against creating board games or card games or ball games or frisbee games or word games or choose your own adventure stories or anything else for that matter. I'm sure as long as you can provide written rules/instructions and any other resources required for playing your game then it should all be kosher!