Undertale is a 2-D role-playing game that uses bullet-hell sequences for combat. It has a very cute, though often dark, story line. It reminds me a lot of Earthbound. I've beaten the average ending and the true pacifist ending.
- The writing is really good. It really makes you feel the feels.
- The game is technically attractive with a mock 8-bit feel. Both the graphics and sound feel 8-bit, but various tells make it obvious that it's 32-bit.
- A lot of nice small touches were put into the game so you're often rewarded for taking a different approach to the game.
- Most of the game's characters are charming without becoming annoying.
- I actually felt bad that I killed Toriel, and tried calling her on the cell afterward, and was saddened that she didn't answer.
- The various mini-games used for combat are really cool.
- A lot of the monsters are clever ideas.
- The idea of making the "hero" out to be the bad guy in the game is quite clever, even more so, the more evil you become, the harder the game gets.
- The various end bosses are really impressive.
- The game remembers your previous play-through choices when you replay it and includes them in the dialog, which is really clever. So, even though the main story is short, there is a lot to do.
- The game's music is phenomenal.
- Some of the sections in the game are quite dull. You often walk down plain corridors consisting of nothing but flat colors. I'm assuming this was added for ambiance, but it just slows down the game.
- Sometimes, the next step of the game isn't obvious, and you wander around for awhile, which is dull.