I had a similar experience some years ago, and have tried a few things since (with varying degrees of success):
- Play it through in your native language first and then replay it in Japanese, and only look up words when you feel like it. This worked well for me with short games without a lot of text, games with a lot of repeat text, or games where most of the gameplay does not involve text except for certain cut scenes (for example, the Pokemon games and Final Fantasy 13).
- See if a transcript of the game exists, so you can pre-read or post-read and still enjoy the game. For example, I was able to find transcripts of the entire game texts for most of the Fire Emblem games on fan sites.
- Follow along with a Twitch or Youtube vlogger who plays the game in Japanese. JapaneseQuest is one I know of who specifically tailors his videos to Japanese learners, and I’m sure there are others.
- This isn’t an option for most games, but for some visual-novel type games you can pre-learn the vocabulary via wordlists others have created (Anki decks, or kitsun or koohi). If the game is for PC, you can also set up a texthooker + yomichan for an easy way to import words you read right into Anki.
- Again, this isn’t an option for most games, but some games on Steam let you switch languages on the fly by pressing a key. Also, many games for the Nintendo Switch you can change your system language and the game automatically switches languages.
And there’s always the option of working on your Japanese and trying again later. 
I’ve done this many times, especially for text-heavy games.
Best of luck, and don’t give up!