[PS3] Beyond: Two Souls (2013)

How:
Read about it on Adventuregamers.
Pros:
- Stunning graphics and settings (snow, underwater, guerrilla, etc.)
- Engrossing and captivating storyline
- Diversified gameplay throughout the story, mixing different genres
Cons:
- Limited interaction, mostly just a matter of following instructions
- Some annoying timed reaction moments with confusing mechanics
- No puzzles
- 90% sad / depressing mood

[PC] The Book of Unwritten Tales: The Critter Chronicles (2012)

How:
Got with a Gem Promo sale at GOG.com.
Pros:
- Awesome background graphics
- Excellent music and voice-overs
- Nice puzzles overall
- Simple, yet engaging story
- Amusing dialogues and writing
Cons:
- Some graphical glitches
- At times you are left without knowing why you are solving a particular puzzle
- Very few locations to visit

The critter disguised as purple tentacle from Maniac Mansion.

At one point in the game you get to use the blue and orange portals from Portal!

[PC] Portal 2 (2011)

How:
Got it together with the first episode in a Portal bundle sale on Steam.
Pros:
- Excellent gameplay and very well balanced puzzles
- Cool untold story that slowly unfolds, additional details can be grasped by doing more things (e.g. save a turret from incineration)
- Awesome graphics full of nice touches
- Excellent writing, dialogues and voiceovers
- Amazing environments and overall mood
- Great music
- Much more lengthy than the first episode
- All gimmicks (portals, light bridges, propulsion gel, etc.) come with a cool, "musical" sound effect
- The story continues with an awesome, lengthy co-op

Cons:
- I didn't like the colored gels too much, too many puzzles with them
- Some glitches

A hidden portrait of Cave Johnson and Caroline.

[Browser] Worldgate Ep.1-3 (2012-2013)

How:
Covered in the monthly freeware section on adventuregamers.com.
Pros:
- Immersive world
- Simple and neat graphics, music and sound effects
- Nice puzzles, some of them moderately challenging
- Intriguing twist at the end (chapter 2)
- Cool to meet the ancient beings (chapter 3)
- Cool wrap-up explanations of the puzzles and devices met in the previous episodes (chapter 3)
Cons:
- Some interface problems (e.g. to analyze an inventory item, you click on its bottom-right corner, which can also happen accidentally)
- Small continuity problems (the journal is updated in the middle pages if the player does thing in a different order)
- The inventory can grow out of the allowed space if the player has more items than expected

[PC] Portal (2007)

How:
Knew about it since HL2, got on Steam with a daily sale.
Pros:
- Immersive and addictive gameplay
- Amazing atmosphere
- Surprising turn of events near the end
- Excellent voice work and amusing script
- Cool puzzle mechanics
Cons:
- Graphics are a bit monotonous
- Music is a bit lacking