Complete the indicated task to unlock the corresponding weapon.
Pause game play, then select the "Extras" option. Select "Cheats", then enter one of the following codes to activate the corresponding cheat function. Note: Enabling cheat codes will permanently disable the autosave feature and the ability to earn achievements or trophies on the current saved game file. Consider saving your game before enabling any of the cheat codes and do not manually save the game afterwards.
Fly under bridges, arches, signs, and other objects to progress in the barnstorming diversions. There is no way to track which ones you already have completed. You only need to complete 75 out of the 128 possible locations.
Snowball's Chance is located in the "Last Chance" area in the northeast section. Sinterpol HQ is in the "Rebellion Square" area in the southwest section, near the highway. Having all Flight Upgrades will make this easier. To ensure success, a good amount of stamina and at least three flaps will be required. Start by going to the roof of Snowball’s Chance Hotel & Casino. Reach the tallest part of the roof then place a map marker for Sinterpol HQ. Charge a jump and sprint in a circle until you are at full speed. When ready, jump towards the middle of the map. At the peak of your jump, start flying. Use one flap early, another one soon afterwards, then a third flap as you pass the large floating building at about halfway to your destination. Maneuver around the building as you fly towards the map marker. Fly directly over it then use "Flight – Hover". You can also hit the peak of the building to qualify. Note: This will not work if you dodged spire missiles along the way.
After you unlock the ability to detonate your summoned imps, repeatedly summon and detonate them. To do this faster, get the upgrades that allow you to summon up to three extra imps (for a total of four) with a single cast.
Get near a lava area found next to a road. Select your fists and wait for a car to drive past. Either kill the driver and exit, or do the following with the driver still inside. Use your melee attack to push the car into the lava and wait for it to explode. You can also get the car into the lava by sprinting into it or using the Stomp ability. Note: Driving the car towards the lava and bailing out will not qualify.
Progress until you can purchase the Sprint – Wall Running Power. Enter an area with a ceiling, such as a tunnel, bridge underpass, building interior, or a building overhang. The ceiling must be reachable using a wall. Wallrun up the wall until your character reaches the top and gets pushed off. Repeat the process ten times.