https://www.humblebundle.com/games/summer-sims-bundle$12
Firefighting Simulator - The Squad
Bus Simulator 18
Bus Simulator 18 - MAN Bus Pack 1 DLC
Bus Simulator 18 - MAN Interior Pack 1 DLC
Bus Simulator 18 - Mercedes-Benz Bus Pack 1 DLC
Bus Simulator 18 - Mercedes-Benz Interior Pack 1 DLC
Bus Simulator 18 - Official map extension DLC
Bus Simulator 18 - Setra Bus Pack 1 DLC
Construction Simulator (2015) Deluxe Edition
Drone Swarm
TransOcean: The Shipping Company
Take Off - The Flight Simulator
Fireworks Simulator
Construction Simulator Extended Edition - 10% off Coupon
Bus Simulator '21 - 30% Off Coupon
Police Simulator: Patrol Officers - 20% Off Coupon
The firefighting game supposedly is pretty good, it has 4-player co-op. The police game that has the coupon is built off the same tech and stuff but with cops instead, has even better Steam reviews. The other stuff looks well...