Lil Gator Game

Once you have completed each of the first 3 quests for Jill, Martin and Avery you can go back to the play area (just beside the tall radio mast) and you can apply each of their upgrades by going and speaking to them after each of their quests are complete. To apply each upgrade you need to have gathered 10 friends for each of their upgrades and 5 friends to help Tom (who's already in that area) do his upgrades, so 35 friends in total. Once you have applied all the upgrades you will be prompted to go speak to your friends, do that and select the option to "Show Big Sis", after a lot of dialogue the credits roll and the achievement will pop - you can continue playing the game and work on achievements still, the game hasn't ended.

This guide will walk you through all of the achievements in around 3-4 hours, timestamps are below the video


ACHIEVEMENTS TIMESTAMPS
12:50 – 1st Bracelet (Part 1 of Infinite Power Achievement)
25:21 – Change of Plan Achievement
33:21 – Enrichment Through Invention Achievement (Jill’s Quest)
49:50 – 2nd Bracelet (Part 2 of Infinite Power Achievement)
58:37 – 3rd Bracelet (Part 3 of Infinite Power Achievement)
1:00:35 – Growing With Water Achievement (Martin’s Quest)
1:28:00 – 4th Bracelet (Part 4 of Infinite Power Achievement)
1:30:11 – Lunch by Compromise Achievement (Avery’s Quest)
2:04:00 – Lesson Learned Achievement
2:16:18 – Name Reveal Achievement
2:17:45 – ACTUAL Name Reveal Achievement
2:18:19 – THIS is the Real Name Achievement
2:19:04 – BELIEVE ME, THIS IS THE REAL NAME Achievement
2:19:43 – EMBRACE THE UNKNOWN Achievement
2:20:10 – Interrupt This Broadcast Achievement
2:20:30 – Ascend Achievement
2:21:46 – Oof! Achievement
2:22:22 – Start of Hero of the People Achievement
2:23:34 – Under New Management Achievement
2:26:37 – Spider-Gator Achievement
2:27:30 – Hero of the People Achievement (continued)
2:30:00 – Craftslayer Achievement
2:32:47 – Demon of DIY Achievement
2:33:40 – Gatorangelo Achievement
2:34:06 – Lizard in Space Achievement
2:34:35 – Hidden Scale Clan Achievement

This achievement is unlocked by completing the main story of the game.

To do this, you’ll need to finish the main quests in the three regions of the big island for Avery, Jill, and Martin. Along the way, you will acquire friends to go hang out at the playground town, and you will need enough of them to finish decorating all of the structures.

Finally, you will need to talk to Big Sis and complete a dream/memory sequence where Lil Gator learns the lesson of the journey. The achievement should pop before the credits start rolling.