Robinson's driving layup with 2.6 seconds left in overtime handed DePaul (3-6) a 79-77 loss.
DePaul freshman guard Brandon Young had an opportunity to answer as time expired with a rushed shot.
"I don't think it was a good look I had at the end," said Young.
It was the second straight non-conference loss for the Blue Demons.
"I'm very disappointed in the loss for us," said DePaul coach Oliver Purnell. "I thought our guys bounced back from the road loss (at Indiana State) the other night and played with a lot more energy tonight."
Indiana State held the edge in the game on the boards by a 41-30 margin.
"There were two critical areas that hurt us," Purnell said. "That was our inability to guard the dribbler. You saw that right there toward the end, but it happened all night in terms of allowing middle drives and penetration. Then the old bug-a-boo of rebounding. We got outrebounded by 11 and we had a chance to win it in regulation. We had a chance to grab two defensive rebounds and we didn't come up with them. Those were two things that really cost us."
It was a tough game for the Blue Demons who got a solid effort from two of their freshmen. Young led all scorers with 23 points and also dished out five assists. Forward Cleveland Melvin added 19 points and seven rebounds.
"This game we played hard," said Young. "At the end we just didn't come out with the W."
Mike Stovall was five of 11 from the field to add 12 points. Krys Faber contributed with 10 points and nine rebounds.
Three players finished in double-figures for Ball State (5-3). Big man Jarrod Jones led the way for the Cardinals with 17 points. Freshman Jesse Berry contributed with 15, and Jauwan Scaife chipped in with 11 points.
Ball State Hands DePaul Overtime Heartbreaker
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