Use every gun in the game

Commandeer 6 vehicles by jumping on them and kicking out the driver

Ask Skeleseer a question

Take a photo at all the photo opportunities

Find all the Hoysala tokens and obtain the Queen's Ruby

Pick a three pin lock in under 15 seconds

Defeat 5 consecutive enemies with the silenced pistol without being detected

Use all the zip-lines to traverse the city

Ram 10 motorcycles

Find 35 treasures

Take a photo at 5 photo opportunities

Open 5 lockboxes

Break stealth and re-enter stealth successfully