By Grady Smith
April 20, 2013 at 05:37 PM EDT

Oblivion topped the box office on Friday with $13.3 million, putting it on pace for an easy weekend win. The $120 million Tom Cruise adventure, which also stars Olga Kurylenko and Morgan Freeman, may earn about $38 million over its first three days, which would be the fourth biggest opener of 2013, behind Oz The Great and Powerful ($79.1 million), The Croods ($43.6 million), and G.I. Joe: Retaliation ($40.5 million). Audiences may have been befuddled by the twists in the film’s plot, as they issued Oblivion a “B-” CinemaScore.

Last weekend’s champ, 42, held strong in second place with $5.2 million and could bat up another $18 million in its sophomore frame. The film, which earned an “A+” CinemaScore grade from audiences, will have $54 million by Sunday’s end.

The rest of the Top 5 is made up of more holdovers. The Croods took in a $2.2 million on Friday and will pass the $150 million mark tonight. It may earn about $9 million this weekend. Scary Movie 5 plummeted 63 percent from its first Friday to $2.1 million and could earn about $6.3 million in its second frame. G.I. Joe: Retaliation‘s $1.6 million Friday has it headed for $5.5 million and $111 million total.

The Bradley Cooper/Ryan Gosling drama The Place Beyond the Pines didn’t break out in a substantial way after expanding into 1,542 theaters. The $15 million Focus film earned $1.4 million on Friday and may take in about $5 million over the three day period.

1. Oblivion – $13.3 million

2. 42 – $5.2 million

3. The Croods – $2.2 million

4. Scary Movie 5 – $2.1 million

5. G.I. Joe: Retaliation – $1.6 million

6. The Place Beyond the Pines – $1.4 million

For more box office coverage, follow me on Twitter: Follow @gradywsmith

Read more:

Oblivion: EW Review

The Place Beyond the Pines: EW Review

42: EW Review

The Croods: EW Review

G.I. Joe: Retaliation: EW Review