Well, Sly 1 is the best game from the PS2 games (in my opinon). The first one is esentally Crash Bandicot-esc level designs mixed with very light collecting (the clue bottles + safe) and some stealth moves to pull of. Granted the stealth really isn't that important (as everyone dyes in one hit) but still, it is very fun to use

. The original is the most Sly-sentric of the original games (with Murry having boring mini games, Sly have one shooting level in....about 2 worlds and Bently having one hacking mini game toward the end of the game) and it is the strongest for that alone. The platforming feels so tight and fun

. The visuals really shine on Vita too; the cell-shading really helps with native res

. The performance on Vita across all three games is solid too (being a largely stable 30FPS with the games running at native res).
Sly 2 is a good sequel to the original in the since that it takes Sly's gameplay and refines it; the controls for the stealth moves feel more responsive, Sly can now sneak around/pick-pocket foes, and he has a run button now. It makes exploring the now larger hub-worlds a blast to explore

. Bentley and Murry return with completely new gameplay styles and its good; the former handles that hacking stuff while the latter handles the fighting (which is quite fun at times

). The only issue the second game has is that it can get boring after a while :l. By the time your reach 2/3rds through the game, you may be tired of it. Granted, that was the case for me, but it may happen to you. It is overall a great game and a great foundation that Sly 4 used to make a damn great game

.
....The less said about Sly 3 the better X(. The game is what would happen if Sonic Team was making a Sly game; playable characters up the wazo, Sly taking a back seat to much weaker gameplay and the game strips away the collecting stuff (clue bottles/treasure) from the hubs. The game still is okay largely due to Sly's gameplay being great still and the visuals looking amazing on Vita....but just skip it man

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The Collection as a whole is a great one; you get two great games for (with this sale) 10 bucks.....sounds like a good deal to me

. I recommend that you just play Sly 4 after you beat the second game if you do get the collection; it is a great game that takes what worked in Sly 1/2 and perfects it

.