Counter Strike 2D - I though it's way boring that the normal one, camping and such, turned out to be epic,as camping is fun, the game encourages you to camp, giving you barricade options.
In normal cs when you would have hided somewhere you may have been invisible, here being a uphead shooter you see the enemy.It's fun.
Plats vs Zombies : I though it was childish, it turned out to be very addictive and fun