Infinite Rocket Launcher

Chapter Select: it unlocks on the results screen as soon as the Total of your best chapter times drops under 5 hours. Each chapter keeps its best time, so you can improve them one at a time.

It is not a new weapon: it switches on infinite ammo for the normal Rocket Launcher, which then shows up in the INFINITE AMMO list.

• You need a Rocket Launcher in your inventory: the free one from the 3-1 sunken boat or one from the shop (₦10,000).
• Switch it on in Special Settings and on the chapter start screen, like the rest of the infinite ammo.
• It does not cover the RPG-7 NVS in 6-3.
• Sources disagree on whether the times must all come from one difficulty: do all 16 on the same one, Amateur.
• The S-rank time limits add up to 5 h 17 min, so going for S is not fast enough. One guide suggests these splits (4 h total): 1-1 10:00, 1-2 7:00, 2-1 13:30, 2-2 11:00, 2-3 13:30, 3-1 13:30, 3-2 13:45, 3-3 12:15, 4-1 17:15, 4-2 12:30, 5-1 7:00, 5-2 18:00, 5-3 30:00, 6-1 20:00, 6-2 20:00, 6-3 20:00.
• Do not Continue after a bad section: quit and restart the chapter.

Do it on Amateur with infinite-ammo guns: afterwards, Professional becomes a formality.