General

Act 1.5: Reunion
Available July 6

Requirements: Lv. 33 and above. Must have completed Act 1.

Accept the quest 'Feelings of Misfortune' from the Heroes of Maple event notifier on the left of the screen. This will move you to the Conference Pavilion.
From here, speak to Moco to access the UI and begin Act 1.5.
Play as Evan as he tries to gain the support of the 3 remaining heroes: Phantom, Mercedes, and Luminous. Travel around the world to speak with the heroes and convince them to join the fight for Maple World's survival!
This is a 100% dialogue Act. Depending on the different dialogue choices made during the Act, different medals can be earned.
Medal Rewards:

Luminous's Focus: Untradeable. Medal. INT/LUK: +4.
Freud's Leadership: Untradeable. Medal. INT/LUK: +4.
Shade's Compassion: Untradeable. Medal. STR/DEX: +4.
Phantom's Freedom: Untradeable. Medal. DEX/LUK: +4.
Aran's Strength: Untradeable. Medal. STR/DEX: +4.
Mercedes's Speed: Untradeable. Medal. STR/DEX: +4.
Rewards:

Clear Act 1.5 once
Shade Cube Chair: Untradeable. Recover 50 HP/MP every 10 seconds.
Clear Act 1.5 twice
Heroes Catch-up Kit: Untradeable. Open this box to receive one of the following items randomly:
Mercedes's Lip Gloss: Untradeable. Consumable. Charm: +300.
Shade's Espresso: Untradeable. Consumable. Empathy: +300.
Phantom's Hand Lotion: Untradeable. Consumable. Diligence: +300.
Aran's Energy Drink: Untradeable. Consumable. Willpower: +300.
Evan's Steamed Potato: Untradeable. Consumable. Insight: +300.
Luminous's Hair Spray: Untradeable. Consumable. Ambition: +300.
Act 2: Abraxas
Available July 14

Requirements: Lv. 33 and above. Must have completed Act 1.5.

Accept the quest 'Feelings of Misfortune' from the Heroes of Maple event notifier on the left of the screen. This will move you to the Conference Pavilion.
From here, speak to Moco to access the UI and begin Act 2.
Help Evan and the other heroes scour the ruins in search of the relic of Abraxas, the Watchful God!
During this Act, there are destructible pots that contain various loot items.
Destructible Pot Rewards:

Bronze Meso: 1 Meso earned.
Silver Meso: 10 Mesos earned.
Gold Meso: 100 Mesos earned.
Broken EXP Fragment: Small amount of EXP based on your level.
Shining EXP Fragment: Larger amount of EXP based on your level.
Rewards:

Destroy at least 70 pots in Act 2
Shattering Pot: Untradeable. Medal. Req. Lv: 100. STR/INT/DEX/LUK: +4.
Skip the riddle part by getting it wrong 3 times
Ignorant of the Truth: Untradeable. Medal. Req. Lv: 100. STR/INT/DEX/LUK: +4.
Kill the gatekeeper 3 times or more
Out Of My Way: Untradeable. Medal. Req. Lv: 100. STR/INT/DEX/LUK: +4.
Clear Act 2 once
Phantom Cube Chair: Untradeable. Recover 50 HP/MP every 10 seconds.
Clear Act 2 twice
Heroes Catch-up Kit: Untradeable. Open this box to receive one of the following items randomly:
Mercedes's Lip Gloss: Untradeable. Consumable. Charm: +300.
Shade's Espresso: Untradeable. Consumable. Empathy: +300.
Phantom's Hand Lotion: Untradeable. Consumable. Diligence: +300.
Aran's Energy Drink: Untradeable. Consumable. Willpower: +300.
Evan's Steamed Potato: Untradeable. Consumable. Insight: +300.
Luminous's Hair Spray: Untradeable. Consumable. Ambition: +300.
TL;DR: You can't unlock the acts until the dates mentioned above.