The RiGS Master Spreadsheet
For a table-top cardgame myself & another designer are working on, we needed a place to view and store card data. So, the master spreadsheet was created. It compiles card data from several other spreadsheets (which we use as expansions or sets) into one big, easy to read, table.
The RiGS Deckbuilder
For the same tabletop card game, I created a deckbuilder, which contains all the cards and allows users to create and save their own deck setups. These could then be printed out and used in playtesting, which helped us to determine balance in a much wider variety of situations and game-setups. It also helped to make players want to play the game more, and gave them a point of connection, which made them want to win, which helped us find unbalanced setups.
Doom At Dawn Playtesting Sheet
For a different tabletop card game made by the same people, we needed playtesting. This was during the COVID-19 lockdown, which made gathering people to test with was impossible. So, as an alternate, I created this spreadsheet which contains all the game data (except the rules) and facilitates the main components of gameplay.
Warengine
Before I was confident enough to create online functionality using Unity, I used Google Sheets to create essentially paper-prototypes since the networking is already done. This allowed for quicker playtesting and iterations. It also sped up the process of turning it into a full build with Unity, which only took about 2 weeks alongside a major team project.