Games like 交叠之夏
Games like 交叠之夏 include Undertale, LoveChoice, Otaku's Adventure, ATRI -My Dear Moments-, and Doki Doki Literature Club Plus!. We matched them by the tags players give 交叠之夏 on Steam (RPG, 2D Platformer, Visual Novel, 2D, and Cute): closest matches first, and among equally close ones the better-known games.

Undertale
Shared: RPG · Story Rich · Funny

LoveChoice
Shared: Visual Novel · Romance · Cute

Otaku's Adventure
Shared: Visual Novel · RPG · Funny

ATRI -My Dear Moments-
Shared: Visual Novel · Cute · Romance

Doki Doki Literature Club Plus!
Shared: Visual Novel · Cute · Romance

NEEDY STREAMER OVERLOAD
Shared: Visual Novel · Cute · 2D

Lucy -The Eternity She Wished For-
Shared: Visual Novel · Cute · Story Rich

Senren * Banka
Shared: Visual Novel · Cute · Romance

The Hungry Lamb: Traveling in the Late Ming Dynasty
Shared: Visual Novel · Multiple Endings · Story Rich

Fox Hime Zero
Shared: Visual Novel · Cute · Romance

小白兔电商~Bunny e-Shop
Shared: Visual Novel · Cute · RPG

Volcano Princess
Shared: RPG · Visual Novel · Multiple Endings

Blue Archive
Shared: RPG · Cute · Funny

灾厄黑龙与谎言公主
Shared: RPG · Visual Novel · 2D

Billionaire Lovers
Shared: RPG · Visual Novel · 2D

CLANNAD
Shared: Visual Novel · Romance · Story Rich

The NOexistenceN of you AND me
Shared: Visual Novel · Cute · Multiple Endings

Parquet
Shared: Visual Novel · Cute · Romance

DELTARUNE
Shared: RPG · Story Rich · Funny

OMORI
Shared: RPG · Story Rich · 2D

I Wani Hug that Gator!
Shared: Visual Novel · Romance · Story Rich

DATE A LIVE: Rio Reincarnation
Shared: Visual Novel · RPG · Romance

To the Moon
Shared: Story Rich · RPG · Romance

NEKOPARA Vol. 2
Shared: Visual Novel · Cute · Anime