Wow, that CoJ Gunslinger + FC3 Blood Dragon double-pack is very attractive.
Blood Dragon is a hammed-up retro-future FPS romp in the style of an 80's scifi-action film. Gunslinger is similar, but replace the sci-fi theme with a cowboy spaghetti western, and you get the idea.
Haven't played it for myself yet, but I have it on good authority that Gunslinger is the best Call of Juarez game since Bound in Blood (some consider it the best, period). Certainly better than the last one - Cartel - which was an abortion.
Both games are silly, over-the-top first-person shooters that throw all caution and seriousness to the wind, and focus on being pure arcadey fun. $6.25/ea is a solid deal considering both games are relatively new.