Viridian is a free print-and-play, roll and write game that has armies of animals defending their forest against invading humans. Technically, it’s a flip and write, where you flip cards for an outcome and then make decisions about what spaces to mark on your scorecard.
The game’s cover illustration has a grizzly with a turret gun strapped to its back. How can you go wrong.
Lost Treasures is a free print-and-play dungeon crawl game. From the author’s description:
Lost Treasures is a simple two player game where each player must hire a party of adventurers to retrieve the treasure from a forgotten dungeon.
Each player represents competing Patrons who wish to recover treasures thought to be lost forever. They use magic and research to locate the treasures but must hire mercenaries to actually retrieve them. The intrigue between them means that when one discovers a treasure the other is not long to follow. One player recruits his adventurers from the noble worthy races, the other from the dregs and evil denizens. Unfortunately due to the rush to try and get there first, sometimes the parties are not as well equipped as they could be. . .
The game includes figures, dungeon tiles, cards and more.
Platemail is a free RPG based on the seminal Chainmail wargames rules. The Book of Magic is here.
Quests of Legend has a nice collection of dungeon tiles for you to print out and use for your role playing or miniatures games (or both!) in a dungeon crawl.
An amazing Malifaux game table