Mastodawn

I've found Electoral Organizing can satisfy both of those requirements. If you're looking for something that might be less impactful I'd suggest the RTS game Beyond All Reason, free to download and play, but I'm sure you'll figure out a way to make it expensive as well (even though it doesn't have micro transactions).

https://www.beyondallreason.info

Beyond All Reason ★ RTS

Beyond All Reason is the ultimate epic-scale RTS game for Windows and Linux. Command colossal armies in battles with thousands of units in fully simulated environments. Wage war across land, sea, and air with 2 factions and 400 unique units. Enjoy skirmishes, scenarios, co-op, and multiplayer matches. Play for FREE now!