Full list of all 52 Saints Row 2 (DE) achievements worth 1,250 gamerscore. It takes around 80-100 hours to unlock all of the achievements in the base game.
The base game contains 42 achievements worth 1,000 Gamerscore, and there are 2 DLC packs containing 10 achievements worth 250 Gamerscore.
Complete all campaign missions in co-op
Complete all Ronin missions in co-op
Complete all Samedi missions in co-op
Complete all Brotherhood missions in co-op
Defeat your partner in a co-op diversion
Played Saints Row 2 in single player or co-op for a combined 50 hours
Complete the Strong Arm tutorial
Completed all levels of all activities
Completed all levels of Heli Assault
Completed all levels of Fight Club
Completed all levels of Escort
Completed all levels of Demolition Derby
Exacted revenge on Julius
Found all CDs in Stilwater
Found and sprayed all 50 tags in Stilwater
Completed all levels of Septic Avenger
Completed all levels of Insurance Fraud
Completed all levels of Drug Trafficking
Defeated the Ultor Corporation epilogue
Gambled $500,000 total lifetime
Defeated the Brotherhood
Killed all Hitman targets
Delivered all the cars to the chop shops
Defeated the Sons of Samedi
Defeated the Ronin
Taunted 50 gang members
Mugged 50 citizens of Stilwater
Completed all levels of Snatch
Got 3 gold stars in Vehicle Surfing
Sung along to the radio
Completed the Saints Revival prologue
Complete all levels of Tow Truck, Fire Truck, Ambulance, and Taxi diversions
Find all stunt jumps in Stilwater
Find all flying stunt locations in Stilwater
Complete all races in Stilwater
Complete all levels of all activities in co-op
Win all six Ranked Strong Arm Activities, and win on all seven Strong Arm maps
Host and win an Xbox LIVE Party Game
Win 10 Xbox LIVE Strong Arm matches
Earn 7 Multiplayer Badges
Earn 15 Multiplayer Badges
Earn 30 Multiplayer Badges
Complete the Corporate Warfare mission arc
Play the Stuntmen Co-op game once
Win 20 rounds in the Stuntmen Co-op game
Your team needs to hold all tag spots at one time in a Strong Arm match on Xbox LIVE
Won 10 Gangster Brawls or Team Gangster Brawls on Xbox LIVE
Complete the Ultor Exposed misison arc
Play the Co-op Mission game once
Win the Co-op competitive mission game 5 times
Call Tera as a homie
Host or play in a party match on Xbox LIVE