This is the first Indie Royale pack that I seriously have considered, actually, I just bought it. There has been many packs before but never have they contained alpha versions of games. If you purchase these alpha versions through this bundle you will also get full access to all future versions of these games, as if it you had pre-ordered the game. Read on to check out all the games and some videos, but feel free to head straight onto the Indie Royale website. Right now the current minimum price is $5.02.

3079 (PC, Mac and Linux) 
In this pack we have: 3079, a sci-fi multiplayer Minecraft looking game that I've seen many times on MoDDB and IndieDB. It looks to be very odd and unique. The game has quests, giant enemies in the sky, guns, randomly generated terrain and some very chunky looking monsters. It's not the enticing one on the list and might not to be fun by yourself, but it should provide some fun coop.
Main Website: https://sites.google.com/site/3079game/

Next on the list is Wyv and Keep, a cooperative puzzle platformer with some 2D graphics. This game has a really charming old school art style that makes me grin just from watching it. You and one other player move through this puzzles and solve them together, in the amazon, in temple ruins and other locations that are typical of an Indiana Jones kind of adventure. Wyv and Keep is set to come out for a full release this summer, but it still looks to be quite enjoyable, check out the trailer.