What games bring you 'in the zone' / provide a 'flow' experience for you?

Some games bring me in the zone/give me flow like no others.

For example the following games do that for me:

• Olli Olli
• Contra (NES)
• Dark Souls
• Street Fighter II (SNES)
• Street Fighter 3
• Street Fighter 6
• Like Dreamer
• Choplifter HD
• XCOM
• Infested Planet
• Tetris Effect

What games are providing you with flow experiences?