Playbooks
Over G is a defensive set inside the 4-2-5 Big Nickel formation, and the play list makes that obvious: Cover 6 Willie, Cover 2 Match, Cover 4 Palms, Cover 3 Buzz Match, Cover 1 Hole, and a deep bag of bracket coverages sit alongside pressure calls like Casino Blitz, Pinch Blitz, Corner Blitz 3, SS Blitz 2, SS Blitz 3, Ws Blitz 1, Ws Blitz 2, Ws Blitz 3, Mike SS 3, SS LB Blitz, and LB Blitz. Over G refers to the line alignment: the front is shifted "over" with the G technique creating an unbalanced 4-man look, the RLE and RRE tags flipping the ends and the NT/RDT tags stacking strength to one side. That means the pressure angles are not symmetrical, so your best rusher is aligned to a predetermined side before you ever touch the D-line shift buttons.
The personnel is Big Nickel 4-2-5: four down linemen, two linebackers (one tagged SUBLB), and five defensive backs including a slot corner tagged SLCB and two safeties who both function as coverage and blitz pieces. That build is the answer to 11 and 12 personnel spread looks in modern Madden. You get nickel-level speed against slot receivers and tight ends without dropping to dime and losing run fits, and the SUBLB tag is usually a coverage-capable hybrid who can survive a wheel or a seam versus a back or a big slot. Against heavy sets you still have four true linemen plus a box safety, so you are not immediately gashed by inside zone or power.
Where Over G separates itself from other 4-2-5 sets is the bracket menu. Bracket 9 Switch, Double Bracket, Double Bracket Switch, 1 Double Slot, 1 Double WR1, 1 Double WR2, and 1 Double TE let you double the opponent's money receiver from the base call without hot routing five defenders. If your opponent lives on one X receiver or one slot mismatch, you delete that target pre-snap and user the remaining single-high or robber player. Pair that with the shifted front and you get pressure from an unexpected angle while the coverage still accounts for the primary read.
Use 1 Double WR1 or 1 Double WR2 on obvious third down passing situations when your opponent has a single dominant target, then user the free safety or hole player to take away the checkdown crosser
Flip the Over G front with D-line shifts based on offensive strength, not by habit: a shifted front pointed at the tight end side slows down power and duo, while flipping it away sets up a faster free rusher on Casino Blitz
Stay in Cover 4 Palms and Cover 2 Match on second and long against spread sets, since the match rules carry verticals and let the corners squeeze anything outside breaking without a manual hot route
Disguise your blitzes by calling Cover 6 Willie, Cover 3 Buzz Match, and SS Blitz 3 from the same alignment, and show the same pre-snap picture every time so your opponent cannot key the safety walking down
Against heavy run formations and short yardage, drop to Pinch Blitz or LB Blitz and manually shade the shifted front toward the tight end, then user the SUBLB to scrape over the top and fit the alley