Styx: Shards of Darkness

This requires you to collect all the tokens that are in any mission. The pause menu will tell you how many tokens are possible for you to find and how many you have found so far. While few of these tokens are hard to find, they are really easy to miss as you could simply oversee a corner or a ledge.

As with the previous game, the Omniscience skill still exists and will make token collection considerably easier if you are not using a walk-through video. Important: You must get all the tokens in every zone in a single playthrough for them to count. This will unlock during the mission completion screen.

See Oh My Gob! for videos of every token location in every mission.