32 - You might think you are doing the world good by killing some monsters. You are wrong. 
Hint 2: The main character's name is a synonym for walking. 
Hint 3: Said monsters are "giants".

31 - "Well, let's see here... I ruined my marriage. Drove my best friend away. Got two psychos and their army after me. And now my brother's gone missing. But, on the bright side, there's no one around to tell me I'm an idiot."
Hint 2: This is the fourth entry in the series.
Hint 3: In part of the opening scenes you get to play a crash bandicoot level. 

30 - Already guessed

29 - No lollygaggin'.

28 - Robots destroy the world. Robots rebuild the world. Racism is still not gone.  

Majoras Mask (because if you explained that changing form works with masks it would be too easy to guess)

#32: The second hint is pretty telling, the third an outright giveaway - it is Shadow of the Colossus.

Yep, was trying to make it easy but it took a while for someone to finally guess it!

Correct!

31 Uncharted 4

This game is such a charming little adventure. An entertaining and moving little story about kids in a small part of the town, where the TV-studio produces a monsters show. So every friday a giant monster attacks and the Earth Defense Force repels the attack. The main protagonist Sohta has moved recently with his parents to this part of town, so he experiences this the first time.

The game was part of the guild series. These guild games were small downloadable titles published by Level-5 in cooperation with kinda prominent japanese game designers. The idea was to give them a bit of room to explore ideas they usually can't follow. The other guild games are good too, but I love Attack of the Friday Monsters!

The gameplay consists mostly of simple puzzles to progress the story. The really great part is, how you can see the world through the kids eyes and how they interpret everything. There is also a minigame with collectible cards. The kids play it to have a ranking, and you can cast spells on other kids that rank below you.

https://www.youtube.com/watch?v=ZLUj6G9AyNE

Yep, thats the one. 

#26 is still unguessed:

#28 Guessed by Darashiva: Jagged Alliance

#27 Guessed by S.Peelman: The Legend of Zelda: Majora's Mask

#26 Guessed by Landale_Star: Supaplex

a) 111 puzzles in a computer hardware themed environment.

b) Explode floppy disks.

c) Eat PCB (Printed circuit board).

#25 Guessed by Jpcc86: Starcraft (+Broodwar)

#28 - The last Sonic game for Wii was considered one of the best.