Croteam

Serious Sam: The First Encounter

Free

Bullet-hell chaos in Egypt

The Talos Principle 2

Paid

The Talos Principle 2: More puzzles, more philosophy

Serious Sam 2

Paid

Serious Sam 2: The old action game you must play

Serious Sam

Trial version

Serious Sam Trial: Explosive Fun, Limited Taste

The Talos Principle 2 - Road to Elysium

Paid

Talos Principle 2: Road to Elysium – More mind-bending puzzles