This poll will run for 8 days. You get 2 picks, no takesies backsies.
Your choices:
The Old Westerns - Games set in the Wild West, simple as that. No, you can't play Red Dead Redemption 2. You'll just have to settle for Wild West Cowboys of Moo Mesa.
It's Archaeology, I Swear! - Pulpy adventures! Tricks, traps, temples and treasures. Cryptic maps, traveling the world in rickety planes, and all the derring-do a safari jacket wearing adventurer can handle. Essentially, if it seems like something that could have come out of an Indiana Jones movie or a Donald Duck comic book, then you're on the right track.
Time Travelers Never Die - Any game with a focus on time travel. It doesn't matter if it is used as a mechanic (Sonic CD, for example) or just story progression, as long you spend time in different eras throughout the game.
Comix! - Games based on comic books! Don't limit yourself to capes here. You can play games based on comics from any region of the world, no matter the format (books, newspaper strips, webcomics, and so forth). Consider Spider-man, Asterix, Dragon Ball, Garfield, or Penny Arcade, to name a few obvious ones. There are a ton of options.
The important detail here is that the comics must be the SOURCE material. In other words, despite Sonic the Hedgehog's 25 year history in comics, he started out in video games and thus Sonic games are not eligible for this theme. You could however, play any TMNT games, as the Turtles were born in comics, despite being more popular in other mediums.
And that's all. I'm looking forward to seeing the results.
Edit: Recommended games, thanks to alienjesus and Ack.