A Sound Player for Unity that can be called from anywhere once placed in the scene. Especially useful for UI sounds and such, but pretty versatile beyond that as it contains settings for multiple different types of sounds (effects, dialogue, etc) and is easily expandable.
It even has some use in 3D gaming as the GetVolume aspects are still static functions. Meaning any AudioSource can modify its volume, accordingly.
Setting up Steam integration for Unity. The video goes into the basics of creating achievements and leaderboards using the Unity Steamworks package. Also covers building/uploading to Steam via the Steamworks SDK. No paid addons used.
This is my attempt at a maze generator in unity, it should be viable for any tile-based game. It takes tiles (corridors or rooms) of a fixed size and builds a customisable path from start room to end room, and then adds similar paths at random points along the chain.