Plants vs. Zombies: Battle for Neighborville is a great third-person shooter that aims to be family-friendly. It takes what previous games did well and adds more content to it at a lower price. PopCap Games knows how to develop a cast of silly and uniquely designed characters.
RAD is a nice throwback to the eighties alongside being a decent roguelite. It won't be a roguelike you put over a hundred hours into, but it will give you enough value for its $19.99 price point. Double Fine hit the mark on making RAD stand out, despite having shortcomings around combat and performance issues when too much is going on.