Hint 1: This game has a diamond horse.
Hint 2: There is a quest in the game, that asks you to kill yourself.
Hint 3: Edgecountries 2.
24 is Borderlands 2?
As guessed correctly by Liquid_Laser the next game is Borderlands 2. But while Borderlands 2 is good, it wouldn't have made the list without a DLC. The Tiny Tinas Assault on Dragon Keep DLC catapults the game into the charts, so great is it.
Yeah, a diamond horse. And not a statue, a living horse.
Borderlands 2 is a crazy shooter. Cool cell shading graphic, silly jokes, extreme weapons, crazy quests. This game is just cool.
As I said above, the DLC with the too long name to spell it again, puts that formula into overdrive. The DLC is a parody to pen&paper games, especially Dungeons&Dragons (in the game the characters play Bunkers&Badasses). As a player of D&D and other Pen&Papers I can appreciate this. But I think the crazyness is even admirable without knowledge of Pen&Paper-games.
In the game you play a Vault Hunter, one adventurer that comes to the planet Pandora in the Borderlands to search for an alien vault and hoping for treasures. But the Hyperion-corporation and their boss Handsome Jack have plans for the planet and he tries to assassinate you right at the beginning of the game. You meet then strange characters and are led through a rough story - all the time with Handsome Jack speaking to you on the communicator.
The gameplay is basically a shooter, but with strong RPG-elements. The player chooses between four character classes (more was added with DLC).
The DLC is placed after the story of the main game (so you should play through it first and let's the characters sit together and play a round of Bunkers&Badasses with Tiny Tina as dungeon master. This is exceptional hilarious.
This game released on PC, PS3 and PS4, X360 and Xbox One and probably some platforms more I'm unaware of. I played it on PS3.
Wikipedia, MobyGames, OGDB, IGDB