UNDERBOX

UNDERBOX is an endless survival boss rush fangame (a sandbox, kinda). Survive for as long as you can and try to beat your own highscore!

UNDERBOX is an UNDERTALE fangame, please play UNDERTALE before considering playing this game.

There are seven levels on total and each of them has a monster with different attack patterns. Try to unlock all of them!

Play as all soul colors! Also, you now have an ENERGY bar and with that you can RUN really fast to avoid projectiles!

The game has a list of achievements/challenges, beat all of them to... um... feel good about yourself...? I guess.

And that's it! Endless fun awaits for you in UNDERBOX!

But... There's something odd about this... Something just doesn't feel right...

UNDERTALE and DELTARUNE created by Toby Fox.

UNDERBOX is an UNDERTALE fangame created by Carlinhos200 (Carlinhosshift).