Mostly different games. The Mad Max game was the Dungeons and Dragons 4th edition version of Gamma World, which I think is the 5th or 6th edition of Gamma World

Mostly different games. The Mad Max game was the Dungeons and Dragons 4th edition version of Gamma World, which I think is the 5th or 6th edition of Gamma World. It was more like a mod for 4e than anything else. The dragons as the rules game was straight up 4th edition Dungeons and Dragons. But the Star Trek game was Lasers & Feelings. The steampunk game was Lady Blackbird which is also free. You can search for them and find the PDFs easily. The cyberpunk game was Shadowrun, which also involves magic and elves, orcs, dwarves. There is a Shadowrun hack for 4th edition DnD, and there's some steampunk stuff in DnD through their Eberron expansion (a playable race is the Warforged). While DnD mostly codifies rules for combat, DMs can totally rewire the game to feature stealth, diplomacy, and other types of interaction. But other games may be a better choice.