Sleeping Dogs: Definitive Edition

All secondary content is available after completing the mission Cease Operations. There are twelve missions comprised of four favors and eight police icons. Note that for all suspicious vehicle missions, there will not be a GPS marker pointing you to a good spot to dump the car, and setting a manual position won't help either.

KENNEDY TOWN
Help the Rookie: Follow him to the fight and defeat the thugs.
Protect the Lion Dancer: Defeat the thugs throwing bottles and talk to the dancer.
Lucky Money: Go behind the shop, beat up the thugs, return the money.
Delivery Boy: Talk to the Pork Bun Guy. Surprisingly doesn't have any thugs.
Known Cult Hideout: Defeat three thugs.
Park Patrol: Chase after the thief, then defeat four thugs.
Suspicious Vehicle: Check the car, then drive it into the water. There's a small pedestrian courtyard off the southwest main road that's east to get to.

CENTRAL
Suspicious Vehicle: Grab the car and drive it into the water, same spot as the story mission.
Suspicious Vehicle: There's two of these with no real difference between them.
Indecent Behavior: Confront the criminal, chase, and arrest.
Public Disturbance: Beat on and arrest the criminals.
Plaza Patrol: Chase down and arrest the thief.

Just adding a couple videos I recorded for some of the bomb disposal missions. Hope these help!

Bomb in the Bay

Bombs Away